Juraj, you previously mentioned that you were able to try different BRDF models in Corona:
Thanks to Dubcat I did some tests with existing BSDFs in Corona (Ward, Blinn?, Ashikmin, GGX), which you can try in extended paramaters in Slate material editor.
I'm running 1.4 (but not the daily build) I must be missing something could you elaborate on the "extended parameters in Slate Material Editor"??
Much appreciated!