![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
Each 3D drawable has an "id" property composed of 4 number values, one value by channel.
The first channel (r) is for mesh identification.
The second channel (g) is for decals group.
The three channel (b) is for lights group.
The last channel is a bit-mask value for post-process effects.
| Usage | r | g | b | a |
| ------------ | -- | -- | -- | -- |
| Identifier | n | |||
| Decals group | n | |||
| Light group | n | |||
| Pixelation | 1 | |||
| Color limit | 2 | |||
| Dithering | 4 | |||
| Outline | 8 | |||
| Shadow vol | 16 |
