RLPA
0   translateX
1   translateY
2   translateZ
3   pane_unk1
4   pane_unk2
5   angle
6   xmag
7   ymag
8   width
9   height
a   ??
b   ??
c   ??
d   ??
e   ??
f   ??

RLVC --> vertex colors, arg can be 0 - f

this calls SetColorElement... except for Pictures (from disassembly) it seems ONLY to have an effect for arg = 0x10!  For this it's alpha

RLMC --> material colors?