Campbell Barton
2c2d52c2de
On undo, sculpting regular meshes would update _all_ GPU VBO's. Avoiding the update gives noticeably faster undo. This is also a fix/workaround for strange behavior with NVidia's driver (T47232), Where locking and unlocking all buffers for updating slows down redraw speed permanently after the first undo. However the problem isn't avoided entirely since a single brush stroke might modify most of the mesh.