I guess it was discussed not once, but I can't find the answer in simple enough terms for the noob
So the question is - are this 512 "forever colors" in TITAN demo can be chosen from standard+light+dark palettes (around 1408 colors in total), or it only one of 512 colors (standard/light/dark) palette? And it can be done not only for one (background) layer?
1) No S/H involved (so the 512 color master palette)
2) It's changing a lot of colors every line (like the moose chase scene in Mickey Mania)
2b) which also means it's dropping sprites due to disabling display during hblank (the "your emulator suxx" message shows up if too many sprites are rendered)
EDIT: note that enabling or disabling S/H doesn't really matter much here (could have gone with 1408 using S/H if really wanted), just that this particular scene doesn't go to the extent of bothering with it.