Hi I''ve got a mesh of a triangulated sphere, with an array of each vertex and an array of indexes into the vertex array for the triangles. I''m using DrawIndexedPrimitive at the moment. So, I''ve got all the vertex sharing I can have. What I want to know is, would using strips or fans be more efficient? Does D3D render these faster than triangle lists, or is their only advantage that they share vertices, in which case they wouldn''t improve on what i''m doing now? Also, at the moment I''m creating all my 3D objects myself, which meant writing the algorithm to triangulate a sphere - that was real hell It works, and even with low detail, with gourad shading it looks smooth on the face, but, if I want a sphere which is going to take up say, about a quarter of the screen, I have to use well over a thousand triangles to stop the silhouette from looking really jagged - is this normal? How are spheres usually rendered in games? Finally, if you have to triangulate some object, is it normally done once at the start, or every time its rendered? Thanks Cameron