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 V2.3.0

New Features
Rebake all baked layers and masks
Paste layer(s) has an option to rebake baked images
New layer and mask type, realtime Ambient Occlusion
Realtime Edge detect can now also be used as a layer
Realtime Edge Detect, AO, and Fake lighting layers are now bakeable as an image
New Dither option (for bake channels) to avoid banding color
New OSL option (for bake channels) to avoid Out of SVM stack error when the material is too complex
Fill selected geometry option when ColorID or vertex color is added in edit mode
Copy & Paste custom bake target
Open Images from Material now will check the node connection by default rather than checking the image names
Paste layer now works with ucupaint node with a different channels list
Ucupaint 2.3 new features
Youtube video demo of realtime AO and rebake all layers/masks
dither_comparison_2_smaller
Comparison of baked channel result with dithering on and off
Changes
New float image will use Premultiplied alpha by default since it has better alpha handling.
Enabling displacement setup will use Displacement and Bump mode rather than Displacement Only
outline_comparison_smaller
Byte image with straight alpha has outline artifacts compared to float image with premultiplied alpha
UI Update
All baked channel data is now displayed at the same time
A bake button is added for some realtime AO/Edge Detect/Fake Lighting layer/mask for easier access
Most Ucupaint operators now can be assigned to a custom shortcut key.
Tree name can now be customized from the quick node setup popup
Remove button is added for baked layer/mask
Open Image in Explorer is added to the image layer/mask/channel source dropdown (263)
Toggle Eraser button will be switched to red Disable Eraser button when the active brush is an eraser.
new_baked_ui
New baked channels UI
Bugfixes
Fix: Misaligned internal nodes location on Blender 4.4+
Fix: Replacing a mask type to Backface will create unnecessary nodes
Fix: Baking with denoise enabled can make the bake result even noisier in some cases
Fix: Group panel shows unused properties
Fix: Open Image as channel source always uses an absolute path
Fix: Duplicate layer won’t duplicate its vertex color data
Fix: Open image to layer channel source sometimes uses incorrect colorspace
Fix: Bake All Channels causesan error when there’s a normal enabled layer with a fake lighting mask
Fix: Duplicate/Paste multiple layers did not recognize multi-user images and decal objects
Fix: Bake Bevel Normal sometimes produces wrong result
Fix: Float image uses wrong gamma color
Fix: Wrong base color of float baked normal
Fix: Bake other object channels with SSAA enabled produce wrong results on Blender 4.5