Enabling or changing the composition guides triggers a scene re-render in viewport.
Where as toggling the viewport overlays entirely does not trigger a re-render.
- On enable / disable the composition guides
- On changing switching the type of guide
Overlays that do not affect the render itself should not trigger unnecessary re-renders.
In case of the compositing guides and artist should be able to try them without having the picture change or worsen in quality temporarily du to re-renders.
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