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Raymarching SDF in Virtual Reality Headset

Hi,

I am using SDF objects in a scene to be visualized in the HTC Vive headset.

When viewing in the headset the setup feels unstable. The objects seem like they are moving a bit with the headset. In the ideal situation, the objects should be static and one can move around with the headset. But in my file, the whole thing seems to be a bit moving.

The file normally gives 60 FPS on the renderer but when viewed with the headset drops to 5FPS to 10 FPS.

How to fix this??

My PC offers two graphic cards of 32gb each and it is only using one of them.