Diffuse transmitter material
Diffuse transmitter material
A render using the new diffuse transmitter material.
This material is a very simple BSDF that basically scatters incoming light into the opposite hemisphere, with a cosine weighted distrubution.
Although it doesn't really have any exact physical basis, it could be thought of as the limit of many sub-surface scatters inside a thin, highly scattering material. As such it should be useful for simulating such materials as curtains, lampshades etc..
It's meant to be used on single-layer geometry, and it does not have an associated internal medium (it's not an interface material).
It will probably be a good idea to blend this material with a normal diffuse material, so that some backscattered light is visible, not just transmitted light.
EDIT:
added textured test.
3 min render time - this material is a lot faster than using SSS.
This material is a very simple BSDF that basically scatters incoming light into the opposite hemisphere, with a cosine weighted distrubution.
Although it doesn't really have any exact physical basis, it could be thought of as the limit of many sub-surface scatters inside a thin, highly scattering material. As such it should be useful for simulating such materials as curtains, lampshades etc..
It's meant to be used on single-layer geometry, and it does not have an associated internal medium (it's not an interface material).
It will probably be a good idea to blend this material with a normal diffuse material, so that some backscattered light is visible, not just transmitted light.
EDIT:
added textured test.
3 min render time - this material is a lot faster than using SSS.
- Attachments
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- difftran2.png (364.98 KiB) Viewed 14136 times
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- difftran.png (407.54 KiB) Viewed 14150 times
Last edited by OnoSendai on Fri May 04, 2007 10:10 pm, edited 1 time in total.
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- Posts: 517
- Joined: Sun Mar 04, 2007 6:20 am
- Location: Stuttgart, Germany
Great!
Should be perfect for leaves. Especially for use with the ivy generator since if already produces single plane leaves...
EDIT: How do you have to point the normals? To the light or away from the light? Does it matter at all? If you have to point them towards the light there might be some probles with texturing the backside... There are nor materials that can be textured from btoh sides, are there?
Should be perfect for leaves. Especially for use with the ivy generator since if already produces single plane leaves...
EDIT: How do you have to point the normals? To the light or away from the light? Does it matter at all? If you have to point them towards the light there might be some probles with texturing the backside... There are nor materials that can be textured from btoh sides, are there?
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- Posts: 517
- Joined: Sun Mar 04, 2007 6:20 am
- Location: Stuttgart, Germany
Re: Diffuse transmitter material
It's great!!OnoSendai wrote:A render using the new diffuse transmitter material.
This material is a very simple BSDF that basically scatters incoming light into the opposite hemisphere, with a cosine weighted distrubution.
BTW,Only cosine weighted distrubution?
Sharper distrubution enables us to simulate a cinema projector ?
Re: Diffuse transmitter material
nice!
edit: I would really like to see what this looks like in a foggy medium!
edit: I would really like to see what this looks like in a foggy medium!

Last edited by neepneep on Sat May 12, 2007 12:43 pm, edited 1 time in total.
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