If i'm correct... Corona for 3DS Max has new (experimental) caustics feature available only in v4 daily.C4D version doesn't have it yet, although you can still use different engines ('experimental' PPM or VCM) to render caustics quite efficiently.And then again, it could simply be wrong material settings, but since you always forget to
provide your study scene file, there's nothing anyone can do to help.
eg. Corona SA v3 VCM (made w/ Blender)
