architectural glass material

[super gnu]

ive noticed that adding glass to my scenes has a large effect on rendertimes, in this case in rt gpu. There is always a large amount more noise on scene elements viewed through glass.

i cant help thinking that some kind of material that simply adds a layer of reflections without doing any refraction calculations at all, and hence does not increase noise on objects behind, might be possible?

i know its not "physically correct" but hell if it looks the same on simple windows etc and doesnt add to the noise/rendertime like normal glass does, id be very happy with a touch less realism..

[vlado]

It is on the "to do" list to add a thin-wall refraction model to VRayMtl.

Best regards,
Vlado

[super gnu]

would that improve the noisiness behind glass? and would it require single faces for the glazing or would it work with the typical glass with a modelled thickness.. ?


is it sufficiently high on the to-do list to arrive by say, tomorrow? ive got a glassy atrium that is costing me an absolute fortune to render on a gpu renderfarm... (as an aside ive discovered that just because gpu renders faster, doesnt mean its cheaper to render on a farm! they seem to have selected their prices so its basically the same cost as cpu rendering, per frame. )

are thre any tricks to do a similar effeect? f.e. using opacity instead of refraction or something? or turning off a vrayproperty somewhere?

i currently disable send/recieve/ visible to gi, and cast and recieve shadows, but it only helps a little with the rendertimes.

[vlado]

would that improve the noisiness behind glass?

No. Just the speed.

is it sufficiently high on the to-do list to arrive by say, tomorrow?

Do you need a solution that works on the GPU?

As an aside ive discovered that just because gpu renders faster, doesnt mean its cheaper to render on a farm! they seem to have selected their prices so its basically the same cost as cpu rendering, per frame.

Do you get those frames faster at least?

Best regards,
Vlado

[super gnu]

No. Just the speed.

same difference! less noise/less rendertime.. i dont care as long as its faster!

Do you need a solution that works on the GPU?

yeah!! i find myself using gpu for the last 3 projects, limitations are getting much more manageable.

Do you get those frames faster at least?

well no because its all bruteforce/lightcache/animated geometry etc, as is the expectation these days.. since i started 20 years ago, my frames always seem to take 1 hr on the current workstation. hardware/software improves, but so do requirements.

i had naively assumed that since it needs less renderboxes to render on, it would be cheaper, but i guess a renderbox with 8x gpus uses a lot of power and costs a fair bit.

Best regards,
Vlado

[/QUOTE]

[^Lele^]

yeah!! i find myself using gpu for the last 3 projects, limitations are getting much more manageable.

**** yeah!