R/G/B/A Channels

Color channel selection is available in the Paint Settings section, after Swatches, in Channel:

_images/rgba-channel-default.png

  • Default mode: RGBA (all channels).

  • Single channel mode: click the separate R, G, B or A buttons to paint in the respective channel.

  • Additive mode: hold Shift and click the R, G, B or A buttons to paint in the respective channel additively.

_images/rgba-channel-additive.png

Grayscale value painting

The Value slider appears after selecting just one of the individual channels. It represents the channel grayscale value. Range is from 0.0 to 1.0, where 0.0 is pure black and 1.0 is white.

To set the value of the channel, you can use the Brush, Eraser or the Fill tools normally. Selections, brush size and opacity are respected.

_images/rgba-channel-value-slider.png

Channel visualization and debugging

See View Modes.

Usage examples

For example, you can use the alpha (A) channel as a weight factor for multi-texture blending. See Multi-texture blending with vertex colors.