Artifacts on rendering

[Amjad50]

Sometimes in Crash2 there is artifacts and slight glitches in GPU rendering.

Maybe the issue is related to using the command buffer for polyline and polygon commands? maybe we should flush when the render mode changes.

[Amjad50]

I think the reason for the artifact is "FrontBlit", the timing of when we perform "FrontBlit" is very important and it shouldn't be delayed.

[Amjad50]

Not sure if this is related, but somtimes we get crashes because we are handling GP0 env command 0xFF, there is no docs about this command, so I think it shouldn't be here, and it happens rarely, so I think there could be some race condition going on here.