Planned Release Date: Q4 2026

About This Software

Wishlist NullFit to get notified the moment it launches. NullFit will be on sale at launch.

Refit outfits onto any 3D character, fast

NullFit refits clothing onto your character's body shape inside Blender. Any rigged avatar and outfit. Results are saved as shape keys you can toggle. A job that used to eat 5+ hours per character takes about 30 minutes, including quick touch-ups on the few outfits that need them. No one-click magic claims: what you see in the screenshots is what you get.

Every feature below is included.

Auto Fit

One click and the outfit fits the body. Pick Auto, Standard or Heavy and NullFit does the rest, leaving a single clean shape key.

Dial In

• Four sliders: Looseness, Anti-Clip, Body Clearance, Polish. Let go and the refit updates in seconds, no bake-and-retry loop.
  
• Presets: Tight, Standard, Loose, Layered.
  
• Fast, Balanced and Thorough refit methods.
  
• A clipping heatmap shows exactly where cloth pokes through before you commit. Apply keeps the result, Revert discards it. Your body mesh is never touched.

Refit algorithms for every body type

• Standard: clean and fast, all most humanoid characters need.
  
• Better: stronger refit plus one-click clipping cleanup. Handles about 95% of standard characters.
  
• Adaptive: for anthro and stylized characters where a standard refit distorts.
  
• Snap: for dragons, custom proportions and anything the others can't track.
  
• If a refit looks off, the panel tells you which option to try next.

Get the fit perfect

• Fit Check heatmap: red where the outfit clips into the body, blue where it floats off.
  
• Auto Clipping Repair with Fast, Balanced and Thorough detection, plus optional smoothing.
  
• Auto-Clean Clipping and Post-Smooth run right after each refit.
  
• Shrink to Fit pulls cloth in snug while keeping the garment's own folds and thickness.
  
• Symmetrize mirrors a fit so both sides match.
  
• Smoothing Workshop polishes any result without rerunning the refit.
  
• Preserved Faces: mark waistbands, trim or anything else you want left untouched.
  
• Preserve Detail with the Better algorithm keeps pleats, frills and fine folds intact through the refit.

Outfit physics

• Preserve Physics Detail keeps physics regions like thighs, chest and skirts behaving after a refit.
  
• Reposition Physics Bones and an Ignore Tails option for characters with physics bones and tails.

Surgical control

• Shape Key Filter: refit only a region ("Breasts Only") or everything except it.
  
• Layer Mesh: fit an outer layer over an inner one, like a bodysuit over a bra.
  
• One Strength dial from 0.5 to 2.0. No guessing at millimeter values.

Batch and productivity

• Refit All Selected outfits in one click.
  
• Match All Shape Keys so the outfit follows every body shape key live.
  
• Multi-Body Wardrobe: capture body shapes as presets, then run any number of outfits against all of them at once.
  
• Transfer Body Weights so store-bought outfits inherit your character's rig.
  
• Align to Body and Bake Cloth Pose helpers to seat an outfit before refitting.

How it works

Install NullFit from Steam, add the included add-on to Blender, and refit from the NullFit tab. Fitting runs on NullFit's servers, so an internet connection is required and your PC doesn't need a strong GPU. Works with Blender 2.93 through 5.x on Windows and runs alongside the CATS plugin.