Ucupaint is a Blender addon to manage texture layers for the Eevee and Cycles renderers.

Compatibility
You need at least Blender 2.79 to use this addon, but more advanced features are only available on the modern version of Blender (2.80+).

Discord Server
You can join Ucupaint Discord to ask or discuss things related to Ucupaint

CHANGELOG BELOW FO V2.2.0

This release includes a significant UI redesign that aims to resolve some of the previous UI issues.

Updated UI
Collapsible Group
It’s now possible to collapse a layer group

group_dropdown

New dropdown icons
Dropdownable UI panels now have distinct arrow icons and are easier to click.

easy_to_click_drodown

Layer channel source
Previously you needed to enable override toggle (hidden by default) to change layer channel value, now you can just change the layer channel source.

layer_channel_input_demo

Other UI changes
Vector option is now outside of layer dropdown
Use lock icon toggle for Uniform Scale
Object index is now consistently labeled Object index instead of Pass Index
Layer and mask sources are now directly integrated into the UI
Experimental display list option to make mask/override images to have their own entries on the layer list
Rebake button is added beside Use Baked button
Changes
Preview mode is now will disable compositor by default since it can change the actual color
Toggle Eraser on texture paint mode in Blender 4.3+ won’t create a new brush but select the available eraser brush asset
Smoother Bump option is now only available if the experimental option is enabled since it’s been deprecated
Bugfixes
Fix: Images won’t autosave when using EXR format
Fix: Manually created UDIM images sometimes don’t get packed correctly
Fix: Apply sculpt to VDM produces wrong result when view transform is not Standard
Fix: UI shows old alpha settings on Blender 4.2+ with cycles renderer
Fix: Wrong bake results with multiple objects with the same material if there are mismatched attribute data types
Fix: Move layer in or out of group can’t be undo-ed
Fix: Renaming layer also renames image atlas mask
Fix: Missing UI when other objects bake data are not found
Fix: Toggle eraser is not working on Blender 4.4
Fix: Manipulating main channels can cause wrong keyframed/driver data