check link below: http://myweb.tiscali.co.uk/3drocknroll/badcylinder.jpg The cylinders have sort of like spots or white ringson them, they were smooth colored before. Before I had a intel exteme graphics, now I have a new Radeon 9600se card. I've checked for opengl errors and there are none. Here's the code to draw the cylinders: #define TURRET_WIDTH 4 #define TURRET_LENGTH 20 for each cylinder: ===================== gluQuadricDrawstyle(turret, GLU_FILL); gluQuadricNormals(turret, GLU_SMOOTH); //do translation+rotation //draw each cylinder like this: gluCylinder(turret, 4, 20, 20, 10, 10); ======================= Any ideas how to get rid of the blotches... I have several other graphics type problems now I have a new card as well... cheers Ade

They look like bad normals to me - it's the right colour and the right shape, it just has the wrong amount of lighting on pairs of vertices. You could try drawing the normals?