alpha: clouds always white
        |general        |skytop               |sun corona
E3      |               |                     |
00      |               |                     |
01      |               |                     |
02      |               |                     |
03      |               |                     |
04      |               |                     |
05      |               |                     |
06      |               |                     |
07      |identical      |                     |
08      |               |                     |
09      |               |                     |
10      |               |                     |
11      |               |                     |
12      |               | sun2 shot           |
13      |               | sun2 shot           |
14      |               | sun2 shot           |
15      |               | sun2 shot           |
16      |               | sun2 shot           | 255 0 0
17      |               | sun2 shot           | 255 0 0
18      |               |                     |
19      |               |                     |
20      |               |                     |
21      |               |                     |
22      |               |                     |
23      |               |                     |