Op 3-11-2023 om 17:49 schreef Mike Miller:
> After taking some time off from POV, I'm ready to tackle a few new scenes I have
> in mind. One involves a landscape with some foreground vegetation. I started
> collecting some 2D sprite images of moss, grasses, and weeds thinking that I
> could populate the ground with them. I've run into a problem with the
> transparent portion of the png when turning on fog. The fog is tinting the
> billboard shape. I've removed the finish and have tried a variety of things in
> the shader with no success. I can fall back on 3D models if I can't get the
> sprites to work.  Below is what I used to texture this example. I understand
> that the bump statement will not have much of an effect without a finish. Any
> help would be appreciated.
> Thanks,
> Mike.
> 

No /help/ from this side, just the (historical) mention that this 
particular fog problem has been around since... prehistory. I first hit 
it, I think, sometime in the late '90's or early '20's when I tried to 
do exactly what you want to do. At the time I was also directed to use 
media instead of fog. Otherwise, there was no satisfying workaround.

-- 
Thomas

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