This was caused by the slight focus gather not being wide enough for small radii. Now the cast to int will properly round the radius to the nearest integer. This is related to T86244 Black Artefacts in EEVEE on Transparent BSDF
This was caused by the slight focus gather not being wide enough for small radii. Now the cast to int will properly round the radius to the nearest integer. This is related to T86244 Black Artefacts in EEVEE on Transparent BSDF