Just been having a go with kray free and after reading the manual I was getting some really good results on a quick test scene that I knocked up in lightwave . So I deceided to try it out on one of my past projects (which was modelled in rhino - so loads of polys and normals all over the place). Unfortunately kray wasn't seeing any of my double sided materials, even with the 'double sided' tag checked. Is there any way around this, or do I have to be more carefull with my normals?
You can download latest Kray demo from Kraytracing.com. It is 1.612 and you can controll version number in the renderwindow. About the doublesided tag, Kray will not understand that. You can't controll doublesided flag per surface but you can instead add cam_singleside 0; in kray's tailer wich will make all polygons doublesided. the best though would be to flip all polys in correct way.