Special effect header

Special effect header:

The special effect header is at "Mystery 4" on each background object. It consists of:

0x00: 0x04 Uint of Special Effect 1 "frames".
0x04: 0x04 Uint of Special Effect 1 offset.
0x08: 0x04 Uint of Special Effect 2 "frames".
0x0C: 0x04 Uint of Special Effect 2 offset.
0x10: 0x04 Uint of Special Effect 3 offset.

The remaining bytes appear to be zeroes.

Each special effect 1 is 0x14 long and apparently consists of 3 uints, 3 ushorts, and two bytes in that order. It's currently unknown what these values are but it likely relates to animated pictures - It's used for the silhouettes in Night, for instance.

Each special effect 2 is 0x10 long and appears to consist of three floats, a byte, and 3 zeroes. Again, it's unknown what the purpose is. It's possible that it relates to the flames in Storm.

Special Effect 3 is 0x08 long, and consists of two floats. This is the texture scroll, first in the X and then in the Y, presumably in texture lengths/heights.