Hi again Philippe,
has I said in the previous post, V-ray material are now supported in Stingray v1.1
But if you have complex V-ray material, it's better to make sure you have a bitmap file in the diffuse map slot, if you have complex subtree with gradiant, blend, color correction, these won't be supported. You can also create Stingray material in 3dsmax (
), but personally, I prefer to do the material editing in Stingray. By the way the Dan Matlack video are a very good source of information.