Volumetrics and Opacity/Glass Transparency

[WAS]

There seems to be an issue with both transparent glass hack (known), and now base default shader opacity with volumetrics.

[WAS]

Actually it seems to be Photoshop encoding in this trial of 2021. PNG and TIFF are both creating this result, it's not the volumetrics. I don't understand what it's doing to the files.

Does anyone know or have encountered this? If I make TG use alpha from colour for opacity it will work, but not just straight as an opacity map like we do for plants and everything like that.

Edit: OH YEAH! That's right! The Terragen plane is just weird. You have to use a card.

[WAS]

Interesting to note that semi-transparency is almost working in Path Tracer, though not Standard. Only issue is the volumetric, depending on how dense it is, makes the semi-transparency glow similar to subsurface scattering.