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Hello all,
I'm trying to create a material for the Skylights which is a slightly milky translucent acrylic prismatic diffuser panel.
The reason this is important is I've been asked to perform a lighting analysis using photometricly accurate lighting to determine:
- how much light is getting to our workstations from our skylights.
- Do we have a glare problem - Glare is a function of contrast and a diffuser panel by scattering the light will reduce the contrast where the ilght falls on surfaces below, as well as when directly viewing the skylight, and anywhere a reflection of the skylight is seen. This is an effect I would have simply faked in the past, but we're being tasked with providing actual numbers in foot candles and cd/m^2 and I was hoping this was something I could just do directly in vray. All was going well until I was told the Skylight material was a diffuser.
Disregarding for a moment determining accurate numbers as to the amount of diffusion, how would I go about creating such a material in Vray so that the light passing through behaves accurately? I thought just a glossy refraction would do it but it doesn't, surprisingly I've never actually had to deal with this phenomenon before to realize that. I tried SSS but I don't know what i'm going with SSS so it's possible that is the problem. Is there a way to do this?
I've attached some screen caps, it's a quick import of the designers sketchup model in to max with a convert to vray materials, so the maps and reflections aren't dialed, but I did model my own skylights. You can see the light coming through she skylights is super sharp.
Thanks!
I'm trying to create a material for the Skylights which is a slightly milky translucent acrylic prismatic diffuser panel.
The reason this is important is I've been asked to perform a lighting analysis using photometricly accurate lighting to determine:
- how much light is getting to our workstations from our skylights.
- Do we have a glare problem - Glare is a function of contrast and a diffuser panel by scattering the light will reduce the contrast where the ilght falls on surfaces below, as well as when directly viewing the skylight, and anywhere a reflection of the skylight is seen. This is an effect I would have simply faked in the past, but we're being tasked with providing actual numbers in foot candles and cd/m^2 and I was hoping this was something I could just do directly in vray. All was going well until I was told the Skylight material was a diffuser.
Disregarding for a moment determining accurate numbers as to the amount of diffusion, how would I go about creating such a material in Vray so that the light passing through behaves accurately? I thought just a glossy refraction would do it but it doesn't, surprisingly I've never actually had to deal with this phenomenon before to realize that. I tried SSS but I don't know what i'm going with SSS so it's possible that is the problem. Is there a way to do this?
I've attached some screen caps, it's a quick import of the designers sketchup model in to max with a convert to vray materials, so the maps and reflections aren't dialed, but I did model my own skylights. You can see the light coming through she skylights is super sharp.
Thanks!
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