Texture lookup in vertex shader behaves differently on iPad device vs iPad simulator - OpenGL ES 2.0

Question

I have a vertex shader in which I do a texture lookup to determine gl_Position. I am using this as part of a GPU particle simulation system, where particle positions are sto

Answer 1

This isn't the only thing that behaves differently in the sim versus the device. I'll make you the same suggestion I make everyone else: Ignore the simulator when you need to test that things look how they should on the device. Only test things like logic, functionality, not look on the sim, and only if you can.