Mask

Masks can be useful to hide or show certain part of a layer. It uses value 1.0 (white) as visible and 0.0 (black) as transparent.

Setting up mask (Quick Guide)

You can access layer masks below the layer channels.

Layer masks panel

To add a new mask just press the '+' button and you'll be given an options menu with many mask types. More details about layer mask types can be accessed here.

New layer mask options

Let's choose an image mask type for example, you'll be given these options:

New image mask dialog box

Choose white as the base color of the mask image, now you can paint black to mask the layer, as demonstrated below.

You can switch between the layer image and the mask itself by clicking the icon on the layer list.

Or you can click this icon to enable mask editing.

Mask Types

Ucupaint has several mask types that can be used, which are:

Image

Same as it's layer counterpart. You can also use images as a mask.

Vertex Color

Same as it's layer counterpart. You can also use vertex colors as a mask.

Color ID

Color ID will use a unique random color ID that will work as a mask. It uses vertex color named '__yp_color_id' to store its color ID, when the color IDs match, then it will be valued 1.0, otherwise it will be valued 0.0. Like vertex color, Ucupaint has special editor to easily edit color IDs in edit mode.

Object Index

Object Index will use pass index of an object as a mask.

Fake Lighting

Same as it's layer counterpart. You can also use fake lighting as a mask.

Blender Generated Texture (Noise, Magic, Brick, Voronoi, etc)

Same as it's layer counterpart. You can also use Blender generated textures as masks.

Baked Images

Same as it's layer counterpart. You can also use baked images as masks.

Multiple masks on single layer

You can have more than one mask in a single layer.

Two masks in a single image

To change the order of mask or do other things, you can use mask menu buttons.

Menu for reordering masks and other things

Mask options

You can change various options of each masks.

Various options for a mask

Like with layers, you can edit the source, vector and blending. You can also mask only a specific channel.