Quake III on MorphOS (details turned up = slow down)

[Fab]

What resolution do you use exactly?

I can play Quake3 at 1024x768@32bits at high quality preset without any problem on my Mac mini with 32MB vram (demo four runs between 40 and 120fps depending on places).

In background i also had 2 1280x1024@32 screens (one for ambient and one for OWB). But it doesn't matter, since the memory management is per-screen.

[EDIT] But indeed, with texture details at max, it consumes quite more video ram, and it's too much.

[Fab]

As you can see, it all adds up. The moment you go for the highest texture detail, you are probably getting to the point where stuff starts having to be switched in and out of VRAM. Not sure how MOS implementation of CGX does this, but I suspect it's not as quick as it could be.

As i said, it's on a per-screen basis (it gets swapped to system ram if needed at screen change). So your calculation about background is quite irrelevant.