Thanks. I’ll try that idea out. Seems like there would have to be some tuning of the alpha in the texture and the Clip Value to get it to smoothly fade out, rather than just mask to a circle round the camera.
Currently for my grass material I have:
PerInstanceFaceAmount — Multiply (with Texture alpha) ---- DitherTemporalAA — Opacity Mask.
I fiddled with the alpha gradient on the texture and I think my current settings are from 0.4 to 1.0 and then I set the Random in DitherTemporalAA to 0.2. OpacityMaskClipValue is 0.05. BlendMode is Masked.
This seems to work, but there are some artifacts due to the dithering. Not too bad for the grass fading into the ground texture, but not so great when you see dithered grass on a hill against the sky, or grass in the sunshine dithered against a patch of dark shadowed grass.