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By Fernando Tella
#338580
Can a coating be considered solid? It has a specific thickness by definition. I wonder if it would behave like that in reality because of refraction...

Does it behave like that with a small emitter (which generates hard shadows)?
#362713
This is a limitation and it's not limited to sun. It will also fail when you use distant/small emitters.
But, there's a very easy workaround to overcome this limitation.

Please follow these steps:
- Activate base BSDF of the coating.
- Set ref=0, trans=254, Nd=1, Atten=999m, rough=0

That's all! The caustics will appear starting from SL2 ;)

Image
#362733
OK I guess I was refering to the look of the shadow. I dont really know what a soap bubble shadow looks like, but I dont believe it looks like that.
Anyway I tried the technique, with sun it seems to work but there is persistent noise in the preview which becomes saturated noise at higher sl. It doesnt work at all with intense hdr shadows, the other images show another technique with faked shadows but at least that works in all lighting situations.

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Change Grass materials

Nope :wink: