Bit depths
From NWN1 Custom Content Guide
How many bits represent the color in a single pixel. The higher the bit depth, the more colors possible. As you can see below, these bits are broken into groups called color channels.
Common Bit Depths: (2bits)
| 21 | = 2 colors | : Also known as monochrome. Usually black and white. |
| 24 | = 16 colors | : Think back to the days of windows 3.1 and MSpaint. |
| 28 | = 256 colors | : Think of your standard GIF quality. |
| 216 | = 65,536 colors | : Hey, we are getting more modern. In RGB setups, 1 bit is wasted. |
| 224 | = 16,777,216 colors | : Not really used as 4 bytes can be processed faster than three. |
| 232 | = 4,294,967,296 colors | : 256 Red×256 Green×256 Blue×256 'something' (usally transparency or alpha channel) |
