The first is a blue and red checker pattern. When working with the GLSL MAT, this check pattern will be on the geometry itself. When using GLSL with TOPs, this checker pattern will fill up the Operator’s viewer and be output from the TOP.

To diagnose these issues, an Info DAT is required. Create an Info DAT, and set the ‘Operator’ Parameter to reference the GLSL operator with the error. In the Info DAT, if there are no errors, there will be only a few lines and of them will read ‘Compiled Successfully’ or ‘Linked Successfully’. If there are errors however, they will read more like:

The next section highlights that this is a syntax error, and then there is more information about the error.