When I use a DirectionalLight with a Shadow component, I often see vibrating graphic artifacts, from wiggling at the edges to distracting herringbone patterns across flat surfaces.
To a lesser degree I also see similar artifacts along the edges of straight objects alongside ground shadows when .receivesLighting is set in sceneUnderstanding.
I discussed these with Michael in our RealityKit lab earlier. I understand this might be "shadow acne" and the shadow's depthBias parameter may effect it.
Can we have an overview of these issues and an approach to adjusting parameters to eliminate it?