Almost all the cars do have shadows so it is not a game options problem. I opened the .cas file for one car without shadows and found that the shadow section was coloned out. I un-coloned the lines and then the car caused a CTD. I opened the OBJ.GTR file and found no shadow.gmt file, which would seem to be the problem. I suspect that that is probably the problem with all the shadowless cars. It all sounds too much bother to fix for a dabbler like me, so I will probably leave things as they are. Thanks for all your help.