In my game, some scene has a fixed camera, so there are some object3Ds which are staying the same per frame(background, trees and so on).
I want to just redraw the object3Ds which are modified per frame(for example: animated objs), don't redraw the others.
How to do this? And how much is the difference of the performance between the 2 methods(one is redrawing all the objects per frame, the other is just redrawing the modified ones.) Could i keep some pixes in the framebuffer instead of refilling it?