Architectural rough glass

[SATtva]

At the moment architectural option is ignored for the roughglass material. Due to this, unfortunately, roughglass takes terribly long time to clear up in places, where you're most likely to see such a material: in shelf or room doors for example (usually you need to double the number of samples to have roughglass objects reasonably clear, i.e. after the whole image is already clean you still need to spend the same amount of time to make the VPU go away on roughglass objects). So i was thinking shouldn't we have an IOR-less version of the roughglass for similar cases?

[pciccone]

Nice idea!

[jeanphi]

Hi,

That sure looks interesting, but if it were that easy I would already have implemented it That's were bidir or SPPM should come in really handy to help denoise faster.

Jeanphi

[SATtva]

Yeah, i thought there should be some pitfalls, that's why posted it here and not in mantis. Unfortunately even bidir has quite a hard time in these scenarios, especially when you have a backlight in a confined space behind a rough glass.

[jeanphi]

Hi,

I know, when it is very smooth the IOR effect makes it difficult, when it is rough the diffuse effect makes it difficult. Maybe we could try to devise a non physical material that would help, but what I have in mind would loose the roughness for transmission, which is probably not the intended effect.

Jeanphi