Extreme shadow acne on iPad 2

[Gamesmold]

Hi there,

I am working on an iOS game with realtime shadows and they work fine on all devices (iPhone 4S and 3GS, iPod touch 4 and 5, iPad 1, iPad 3) except for the iPad 2.

Only on the iPad 2, it shows extreme shadow acne, with stripes over all surfaces, no matter their angle towards direction light.
I tried everything - changing bias, changing shadow resolution, but with no success at all.

My iPad 2 runs iOS 4.3.2, as it is my iOS 4 test device (the others run either iOS 5 or 6).

I remember there were some issues with Open GL on the iPad 2 - so, is this just due to the buggy 4.3.2 system? Or is there a general bug with the iPad 2 GPU ?

Thanks a lot!

Thomas

[koochy_rat]

I am facing the same problem on an iPad 2 running iOS 4.3.3. The surface receiving shadows gets stripes all over. Any solution to this? Can anyone confirm it is just an iOS issue?