| Value | Meaning |
|---|---|
| indexed0x7B | 8-bit indexed Directly follows bitmap or uses global palette. |
| a8r8g8b80x7D | 32-bit A8R8G8B8 |
| a0r8g8b80x7F | 24-bit A0R8G8B8 |
| a1r5g5b50x7E | 16-bit A1R5G5B5 |
| a0r5g6b50x78 | 16-bit A0R5G6B5 |
| a4r4g4b40x6D | 16-bit A4R4G4B4 |
| dxt30x61 | DXT3 4x4 packed, 4-bit alpha 4x4 grid compressed, half-byte per pixel |
| dxt10x60 | DXT1 4x4 packed, 1-bit alpha 4x4 grid compressed, half-byte per pixel |
<a href="https://www.wiki.sc4devotion.com/index.php?title=FSH_Format#Bitmap_or_Palette_Data">Bitmap data</a> (SC4D Encyclopedia)
FSH images can store their pixel data raw, or they can make use of Microsoft DXTC compressed formats.