Originally Posted by bkoz
Has anyone experienced problems using Intel's compilers with OpenGL? We have seen intermittent lighting issues with both 32 and 64-bit (version 9.1) Intel compilers that we do not see with gcc.
See the attached snapshots for an example.
Try adjusting the floating-point optimization. I've seen the compiler be over-aggressive with FP code generation and fixed it by forcing precise FP code.