I\ve implemented batch rendering using vertex and index buffers to render multiple objects with the same texture simultaneously. the problem with this (or at least with my implementation) is that it only works for objects that aren''t moving. I have all of the vertices defined in world coordinates and can simply pass the vertices in to the VertexBuffer without translating them. The problem is, this won''t work with objects that move (and therefore have their vertices in local coordinates and an overall translation/rotation as well). I suppose I could take the overall translation/rotation and use that to convert all vertices in to world coordinates and then use my generic batch rendering for the objects, but this sounds _slow_. Alternatively, every time I''m sure this is pretty standard stuff (unfortunately, search is down right now), so I''m sure there''s an easy answer. Can someone give me an idea of the optimal solution for this? Onnel