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I have a scene I would like to do a fly-through on. There are quite a few polygons. This means that blender spends quite a lot of time loading the scene before it stars to render it. It should not reload the scene because nothing has changed (except the camera). Is there a way to tell blender to only load the scene once and then just re-use what is in the RAM? I am using cycles.

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In the performance panel of the render tab, check Cache BVH:

enter image description here

This will make Blender use the last BVH built when you press F12.

If you want faster render times for the viewport, change Dynamic BVH to Static BVH: enter image description here

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