Options available in the Create New Paint Layer window.
Specifies the image file format and bit depth (8, 16, 32) for the image you are going to paint. For a list of supported image formats, see Paint file formats. The higher the bit depth, the smoother the blending of colors in the image. Higher bit depth images can sustain color and contrast adjustments with less degradation in quality compared to low bit depth images.
Specifies which paint channel to apply the paint and how it appears on the model as a result. Channel types include: Diffuse, Specular, Gloss, Specular 2, Gloss 2, Bump Value, and Reflection Mask. For example, if you want the paint to appear as the diffuse base color material for the model, select Diffuse (default). If you want to paint a bump texture that appears more tactile (for example, one that renders in relief or appears like it is embossed), select Bump Value.