Steps to reproduce:
1. Open attached project on a Mac
2. Open SampleScene
3. Adjust Volume Global -> Fog -> Volumetric Fog Distance while looking at ButterFlies VFX
4. Observe that white artifacts occur at the edges
5. Select butterflies lit quad output and untick "Cast Shadows"
6. Notice that Volumetric Fog works correctly now
Expected result: Lit Quad VFX with "Cast Shadows" enabled should not cause volumetric fog to clip when Fog Distance is adjusted