A 3D modeling application with the ability to effortlessly switch between organically sculpting high-polygon models and controlling hard-edged surfaces.
User reviews:
Positive (45 reviews) - 80% of the 45 user reviews for this software are positive.
Release Date: Dec 19, 2012

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About This Software

Available for an incredible low price exclusively on Steam, Silo 2 is a focused 3D modeling application with the ability to effortlessly switch between organically sculpting high-polygon models and precisely controlling hard-edged surfaces. It can be used for anything from creating 3D characters for video games and movies to quickly exploring 3D architectural ideas.

At Silo's heart is an innovative, robust, and 100% customizable polygon editing toolset, suitable to both organic and hard-surface modeling. This polygonal base mesh is used to drive subdivision surfaces if desired: just hit C and V to navigate between subdivision levels and the base mesh at any time. Those coming to Silo from other applications will find that, despite having fewer tools, Silo isn't lacking any functionality. Instead, basic modeling tools such as Tweak, Cut, Bevel, Extrude, and Slide intelligently adapt to the task at hand based on context, drastically cutting down on the time spent switching or hunting for tools.

On top of this core toolset we've added non-destructive brush-based displacement painting (especially useful for high res meshes or directly editing subdivision layers), advanced uv unwrapping, and the unique Topology Brush which lets you literally draw a new edge flow onto a 3D surface. Intuitive, advanced selection tools including Tweak, Loop, Ring, Path, Grow/Shrink, and Soft Selection are key to a fast, fluid workflow.

Silo is currently being used at top studios worldwide as both a stand-alone design tool and as a versatile element of a multi-software 3D graphics workflow.


  • Zen Workflow - Silo's careful design and its focus on pure modeling allows it to have a free, uncluttered feeling which is simply not possible in larger applications. Whether you are working to precise specifications or sketching out your thoughts, it is much easier to do so in a calm, focused modeling environment. This benefits professionals who are coming to Silo to escape slower, more complex software. It also benefits hobbyists and students, who are able to learn everything they need without having to deal with anything they don't need.

  • File Formats - Silo supports import and export of .sia, .sib, .obj, .3ds, .dxf, and .fac, as well as the export only of .stl, .pov, and .rib.

  • Advanced Polygonal Modeling - Silo offers a comprehensive set of interactive, context-sensitive tools for rapid polygonal modeling. The workflow is focused on having a few powerful, intelligent tools, rather than a separate command or option for every conceivable function. Additionally, "sticky key" functionality allows tools to behave differently if a hotkey is held down. Key modeling tools include Break, Tweak, Cut, Bevel, Slide, Scale, Extrude, Polygon Tool, Edge Tool, unlimited Undo and Redo, and more. Modeling can be performed with or without manipulators, including the Universal Manipulator which combines rotate, scale, and translate into a single manipulator.

  • Comprehensive Selection Tools - Robust selection tools are the key to great modeling, and a quick look at the Selection menu shows Silo's development has focused heavily on this area. Some highlights? Multi Select mode allows users to select vertices, edges and faces without changing selection modes. Tweak selection allows a user to grab, move, and deselect a component with a single click. That and many other tools work with Soft Selection, which smoothly distributes changes throughout a shape. Paint, Area, and Lasso selection types are supported. Select Visible and Select Thru functions are both available - by default, use the left mouse button for Select Visible commands, and the middle mouse button for Select Thru. A separate Undo is available for cycling through recent selections.

  • Subdivision Surfaces - Subdivision surfaces offer a smooth, high polygon shape, and are easily accessible in Silo. Using default shortcuts, simply press c to subdivide as many levels as you want, and v to unsubdivide. Modeling can be performed in real time at any subdivision level with updates shown directly on the subdivided shape. Edges can be creased to keep them sharp at all subdivision levels.

  • Unparalleled Customization - Designed to fit into any pipeline, Silo is the most customizable modeler available. That includes complete customization of the mouse, keyboard, and graphical interface, allowing it to closely emulate other applications a user may be familiar with, or perform tasks (such as assigning up to 40 different commands to a typical mouse with keyboard modifiers) which no other application can. Favorite tricks include assigning undo/redo, grow/shrink selection, and to the scrollwheel, or simply putting frequently used commands on the right mouse button with modifiers. Silo's button pages allow users to create their own multi-page interfaces, and assign any command to any image. The interface and color scheme are also highly customizable. Customizations can be easily imported, exported, and shared. Even the Primitives menu can be customized with frequently used models or settings.

  • Advanced UV Editing - Silo offers multiple types of unwrapping, including LSCM, Planar Region, XYZ, Per Face, and By Neighbors, which heals UVs based on the UVs based on the surrounding area. Different unwrapping methods can even be used on parts of the same mesh for optimal results. UVs are preserved during modeling operations, so modeling and UV editing can be freely interchanged with little to no cleanup. (This is particularly useful when a last-minute modeling change needs to be made to a "finished" model.) Clutter is significantly reduced by allowing regular geometry editing tools (such as Break, Merge, Tweak, Slide, and Soft Selection) to be used to edit UVs wherever it makes sense. Even the displacement brushes, particularly the Smooth brush, are very useful when applied to smoothing out UVs.

  • Displacement Painting - Finally, brush-based displacement painting has been well-integrated into a traditional modeling environement. Silo's brushes integrate seamlessly with the rest of the modeling toolset. If the model is subdivided, the brushes will affect the subdivided shape directly, otherwise they will affect regular geometry. As with UVs, displacement is preserved where possible during modeling changes, so the brushes can be used alongside other tools as the model develops, rather than solely at the end of the process. Painting is smooth and natural, and works well with tablets. Displacement maps and normal maps can be generated and exported from any subdivision level, or even from two completely separate objects.

  • Retopology - With the popularity of displacement painting in Silo and other applications, as well as the common usage of 3d scanners, modelers are frequently asked to create a new, well-formed model with a high-poly shape for reference. This process is frequently known as retopologization, and Silo's Topology Tool provides an innovative solution by allowing users to directly draw new topology onto an object using a pen-like tool. Silo also offers Surface Snapping, which effectively turns every tool into a topology tool by snapping edited geometry to an underlying shape, and the Surface Tool, which allows users to quickly in interactively draw out and tweak strips of polygons.

  • Scene Editor - Complex Scenes can be easily managed in Silo via the Scene Editor, which displays the scene in a tree-like structure and allows layer-like editing of objects and groups. Selection, display mode, locking, and visibility can all be quickly modified from the editor.

  • Numerical Editor - Silo offers precise numerical control of the position, rotation, scale, size, distance, and angle of selected geometry via the Numerical Editor.

  • Snapping - Three powerful snapping modes are available in Silo. Grid snapping snaps to the customizable workgrid, Component snapping snaps to the vertices, edges, and faces of an object, and Surface snapping smoothly snaps to the surface of unselected objects. These snapping modes affect nearly all geometry editing commands.

Support and Resources

Help, tutorials, and videos for Silo are all maintained online on the official Silo website. You can find hours of training videos on their tutorials page and other content on the Nevercenter 3D Modeling Wiki, which offers many resources for modelers using any application. The Silo user forums are also a great place to search, share, and find answers to your questions.

System Requirements

Mac OS X
SteamOS + Linux
    • OS: Windows 7 or better
    • Processor: 1 GHz
    • Memory: 512 MB
    • Hard disk space: 20 MB
    • Video Card: Graphics card supporting 1024 x768 x 16-bit color and OpenGL
    • Memory: 1 Gb
    • Video Card: 32 bit color compatibility
    • Additional: Three button mouse or mouse with scroll wheel
    • OS: OS X 10.8 or higher
    • Memory: 512 MB
    • Hard disk space: 20 MB
    • Memory: 1 Gb
    • Video Card: 32 bit color compatibility
    • Additional: Three button mouse or mouse with scroll wheel
    • OS: Tested on CentOS 6.5 and Ubuntu 14.04
    • Memory: 512 MB
    • Hard disk space: 20 MB
    • Memory: 1 Gb
    • Video Card: 32 bit color compatibility
    • Additional: Three button mouse or mouse with scroll wheel
Customer reviews
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Positive (45 reviews)
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33 reviews match the filters above ( Mostly Positive)
Most Helpful Reviews  Overall
78 of 101 people (77%) found this review helpful
4 people found this review funny
Not Recommended
128.0 hrs on record
Posted: December 15, 2014
If it were free, I would recommend it, but it is not. I bought it for 30 while it was on sale, so I found that to be money well spent. However, when the price is 80 US dollars, making it only 10 dollars away from something as powerful as 3D Coat, which does modeling like magic and mixes in sculpting and among other things. It is very very hard to recommend this relic to anyone when for 10, 20 or 30 dollars more you get much much more useful software like Modo Indie or Substance Painter. This was an astounding and flexible piece of software 5 years ago, that’s for sure. Now? It's old, it's buggy and overpriced.
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37 of 46 people (80%) found this review helpful
6 people found this review funny
621.5 hrs on record
Posted: June 25, 2014
As you can see I've played this game a lot. Unfortunately I'm not sure how one would win this game with over 300 hours played it remains a mystery.

Joking aside Silo 2 is a very competent low poly modeler with fairly easy to use UV unwrap tools.

On the downside its clearly no longer updated or in development (although the company that owns it always denies this despite years of no bug fixes or version changes) so if you do happen upon a bug you will have to learn to work around it.

Generally its cheap entry price and simple approach to low poly modelling is refreshing enough its worth picking up when on sale for sure ; otherwise you might want to check out other options like Blender 3D while complex, with overtly complex UI it is constantly being improved upon and free.
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26 of 30 people (87%) found this review helpful
1 person found this review funny
110.3 hrs on record
Posted: December 20, 2013
Silo 2 is a pretty neat modeler, although unfortunately, nothing else. Still, I find myself really enjoying working in it, as it's a lot easier to use than most commercial software out there. The basic interface is pretty self explanitory, and isn't cluttered with things you won't need, however, you can pretty much customize it to your preference, so migrating from other software won't make you feel that out of place. I've used the demo first, for 30 days, and only had 1 crash happen, so far, It has been pretty stable for me.

If you want to buy this, try it out first, as some people don't seem to like it (but that's pretty common with everything anyways). You have to keep in mind, that everyone's preferences are different, so you have to find the right tool for you. There's a similar software called Voidworld, which is free, and was practically created to be a replacement for Silo, you can try that too and make comparrisons yourself. However, it's not as optimized, so it eats quite a lot of your resources, and might not run as good on your computer as on anyone elses (I practically couldn't use it, because it kept crashing, but I have a crappy laptop).

If you're looking for other, similar commercial software, you can also give Hexagon 2.5 a go (from Daz3D). It can do pretty much the same thing, with the addition of directly painting onto models, althought not as good in that field as 3D-Coat, as some parts of the UV need tweaking before you can begin painting (if you don't want to have streched textures on certain verticles). Unfortunately, that too, like Silo, is not being updated anymore. Still, don't let the lack of updates discourage you from software if you enjoy working with them. At the end of the day, it's all about what you like, and how you can utilize your tool anyways.

Also, If you're new to 3D modeling, make sure that you understand the basics. These are universal, and not exclusive to any kind of application. If you don't know your foundations, you might feel uncomfortable and let down, after a few failed attemps at translating your thoughts into a model.
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14 of 21 people (67%) found this review helpful
24.2 hrs on record
Posted: December 21, 2013
Good program for beginers and industry standards also used in Digital Tutors as one of the best easy and fast modeling programs out there, UI is clean and solid , the performance is great

Modeling Tool only, Poor coding within the program its self, the program is very hardware dependant and also crashes when any model is at 1mil polycount so be warned when modeling in this program, program is no longer supported | abandoned from the company

Apart from the crashing when you hit 1mil polycount, this program is a decent modeling tool for the price its at, with all the others being extremly high cost. the program is good for people wanting to start in the industry for beginers or for artists wanting to freelance or sell there models online.

Important Side Note:
because its no longer supported | abandoned there is no support for it if you have any issues.
(excluding the 1mil poly count crash)

Side Note:
If you cant afford to buy any 3d software there are 2 free to use alternatives to get you started which are
you will need to research if there only for personal, commercial use or both

15,07,2014 Update
I was surprised yesterday on the 14th, I noticed a update from silo 2 -
v2.3 that was posted on july 2nd

Note: This update focuses mostly on Silo for Linux (our most-requested update), plus small bug fixes and internal optimizations that should benefit all users. We've also added .stl import and an updated windowing system. Much of this update is internal code optimization to pave the way for future updates. (So even though we've added support for a whole new operating system, we've kept the version increase small--just 2.2 to 2.3.)

source: https://www.facebook.com/Silo3D

only took them over a year to release a update
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22 of 38 people (58%) found this review helpful
Not Recommended
13.5 hrs on record
Posted: December 10, 2013
Silo 2 is a fairly decent program warned the lines of beginners than anything, however they may find a number of things to hold the lack of tutorials and support, overall it is a decent model program for its price.
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5 of 6 people (83%) found this review helpful
Not Recommended
10.6 hrs on record
Posted: August 16
I bought Silo back when it was only $80 and during a 40% off sale so I didn't spend much. But now the full price is $119.99 without any real updates - WTF?!? For the price and considering Silo is abandonware I simply cannot recommend Silo. Instead I'd recommend Blender (free) or Modo Indie (cheap).

I originally purchased Silo for at home modeling. Although experienced and trained in 3ds Max and Maya those are just too expensive. I had also first tried Blender but was so put off by the user interface that I ended up buying Silo. This turned out to be a mistake because I ended up revisiting Blender went thru some free tutorials on cgcookie website and Blender became easier to use. Blender might take longer to learn but the reward is that it is more powerful and faster to work with once you learn it.

Right now I have over 50 hours in Modo Indie. Modo is the best modeling software I have ever used. Ever. Better than 3ds Max and that is saying a lot because I love 3ds Max. Modo Indie's Meshfusion and Procedural Modeling is simply amazing - look on youtube for demonstrations. Modeling in Modo is 20 times better and 5 to 10 times faster than working in Silo. Modo Indie is available at low monthly subscription cost or full license. The full price of Modo indie is $299 and if you compare price and features to Silo it's a no brainer. With Modo you are getting not only better modeling and uv tools - you can also texture, sculpt, animate and render with a high quality ray traced renderer. And to top it off Modo has an awesome user interface. (If you want to purchase a full license for Modo wait for a sale.)

I'd only recommend Silo if it were free especially since the developer is putting zero time into it. Both Blender and Modo are actively being developed.
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9 of 14 people (64%) found this review helpful
1 person found this review funny
87.9 hrs on record
Posted: January 17, 2014
Silo is a modeling package that is designed to do modeling and nothing else. By focusing on just modeling however, it's able to make itself into an intuitive tool used for quick modeling and UV mapping.

The interface has some very smart, intuitive features (hitting a hotkey combo while hovering over a menu option will assign that hotkey to the menu option for example) that make using the program quick and easy.

With it being a smaller program with less community than, say Maya, 3ds Max, or even Blender, finding help on line for modeling beginners or Silo newcomers can be troublesome. Other issues include the fact that it can be fairly easy to crash the program if you're not careful.

However the ease of use the program brings to the table, not to mention it's incredibly fair price make it a program to look into if you're in the market for a affordable helpful modeling program.
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6 of 9 people (67%) found this review helpful
1 person found this review funny
211.8 hrs on record
Posted: February 16, 2014
A lot of people give this software flak about what it is and what it does. But I'm here to clarify what this software is all about. It's an excellent modeling software with great and easy to use user interfaces from everything to UV mapping to basic sculpting. Does it crash, yes; but only sometimes and it also depends on how much your system can handle and how much your pushing the software. It's crashed on me while sculpting but only because I pushed it to it's extremes (which I said before, it's only ment for the basics when it comes to sculpting). But, when it comes to modeling for literally anything; the imagination behind it is the limit. I've used this software for practically everything during my associates degree in 3d modeling and animation for college assignments and it has been flawless for me (and I'm still using it to this very day and still have no complaints). You will also see that a lot of people argue that it needs updates. I would have to agree but, if they were to update it; it would have to be a very large one. For, their isn't really much to update. All in all, it's a great software and well worth the money in my opinion and recommend it to anyone interested or even already in 3d modeling.
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6 of 10 people (60%) found this review helpful
238.9 hrs on record
Posted: March 29, 2014
Silo is not the best tool on the market, but any experienced 3D artist will agree that there is no equivalent to a "panacea" in the 3D-modeling fields. Silo is a focused polygonal modeling tool with some limited sculting capabilities and that pretty much covers it. It has UV-unwrapping functionality as well, but it is painfully inadequate and very difficult to work with.

Silo's primary strength lies in its user friendliness and how simple, fast and reliable you can build a high-quality mesh of either a lowpoly or highpoly nature. Creating a character mesh by manipulating Silo's great subdivision functions and adding details with the paint displacement tool is nothing new that you would not be able to do in 3DS Max or Blender, but it is the ease of doing so in Silo that sets it apart from its competitors.

This tool is not for everyone and I recommend trying it before you buy it.
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7 of 12 people (58%) found this review helpful
144.8 hrs on record
Posted: September 30, 2013
Easy to use and user friendly 3D modeling program with an amazingly simple interface. Silo is glitchy as hell its a good program to learn in. You'll have to find something else for texturing though, the UV mapping tool in this is pretty much broken.
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Recently Posted
2.0 hrs
Posted: July 1
Nice tool, pretty good for beginners.
Technically you can model everything out of it, but i prefer to use it for simple stuff.
I don't think it's worth full price, i recommend grabbing it on Steam Sale (just like i did).
First - check the demo version to make sure you like it.

If you don't have money / don't want to spend money you can also check Blender (free modeling and animating tool) which offers more, but is harder to learn.
Helpful? Yes No Funny
paranormal potat
0.5 hrs
Posted: February 2
it sucks

/; /; /; /;
Helpful? Yes No Funny
12.5 hrs
Posted: December 21, 2015
Silo is completely configurable, you can do what you like with the interface, and it's very estable, and is a very fast modeler
Helpful? Yes No Funny
229.2 hrs
Posted: July 18, 2015
Nice straight forward modeling program.
Helpful? Yes No Funny
DangDut is TheMusic of MyCountry
7.1 hrs
Posted: April 29, 2015
Silo is simple, good & fast modeling.
Helpful? Yes No Funny
Woo Woo
38.7 hrs
Posted: March 26, 2015
Definitely started listening to zen music after using this program.
Helpful? Yes No Funny
292.3 hrs
Posted: March 18, 2015
This is by far one of my favorite pieces of modeling software; it's easy, simple, fast, straight forward, and just... well, it's just wonderful. I don't think any other modeler lets you create organize shapes from non-organize shapes as quickly and effeciently as this one does.
Helpful? Yes No Funny
[cwz] gnome-king
3.7 hrs
Posted: February 22, 2015
As a beginner as far as modelling goes, it had a bit of a learning curve...but as I get a hang of it, it is a pretty good software. Add on that it is double the price that it can be found on Steam for on the software's site, I find this to be a pretty great deal. Can be used to create OBJ files which can be used in 3D printing, depending on the printer of course.
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Fabled Sentient
14.5 hrs
Posted: December 25, 2014
Silo 2 is a great program if you have more than a beginner level of understanding when it comes to modeling. I've only used it for a few things but from what I can see the program has a lot of good tools and simple UV unwrapping. When it comes down to it and you are looking for a cheap lightweight modeling program, this is something you may want to consider. I would say that Silo is more for advanced users, the documentation is kind of lacking and there haven't been any updates to it for quite some time. The sculpting part of it is a little weird, I would not recommend this if you're wanting to sculpt something. I would look into tools that contain dedicated systems for this such as ZBrush, Mudbox, or the most common free tool, Blender. All in all, this is a great piece of software if you're willing to learn most of Silo through trial and error.
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