Imagination PowerVR SDK Blog

The PVR tile engine freaking out?



I’m currently doing quite advanced shader stuff on my iPad2 and so far everything has been working fine, but all of a sudden when adding a bit more complexity I’m starting to get really strange frame buffer artifacts. I’ve been unable to screen capture them though but I might be able to take a photograph later this week. It seems like I’ve hit some performance / bandwidth limit that isn’t handled gracefully.

What I’m seeing is that parts of the frame buffer suddenly drops out in tiles (that’s why I suspect the gfx hardware actually). Sometimes it just render some background in a tile but then skips the foreground. Some places aren’t updated at all and shows remains from a previous frame etc.

Any ideas what might cause this? And how I can avoid it?


I have been able to capture some screens now. To whom may I email them?


Hi JackAsser,

send them to please.



Hi Marco!

Thanks, sent!