I have a shader that requires a pixel version 3( ps_3_0) otherwise at the moment of compiling it throws the next error:
‘Compiled shader conde uses too many arithmetic instruction slots…’
The patch runs properly on a mac book pro using a NVidia GeForce GT 330m. However, when I try to render the same patch on a MacPro with an ATI Radeon HD 5700 I just get a black screen. The shader compiles properly on both hardwares but the ATI seems to dislike something but the console doesn’t throw any errors.
As I mentioned before I cannot revert to a pixel version older than ps_3_0 as it will throw the mentioned error.
Has anyone experienced something similar when switching between Nvidia and ATI cards? any possible reason behind this?