daros wrote: ↑Mon Nov 02, 2020 1:48 pm
But since we have only two variables, material and light, it is not even so important. Color bleeding would behave proportionally in the same way even if the white material is 5% warmer or colder, or if light is 5% warmer or colder.
No, it does all the difference if you are using a matte (0.5, 0.5, 0.5) or matte (1.0, 1.0, 1.0). Or if you use a matte or glossy material.
Copper is copper but on what basis have chosen the material type anf the materials parameters of white material ?
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I used rectangular led lights with a CRI 95 and measured kelvin of 4250.
The problem is not the copper image by itself. It's the relation of the full white image with the copper image which points to a color bleeding problem.
daros wrote: ↑Mon Nov 02, 2020 1:48 pm
But since we have only two variables, material and light, it is not even so important. Color bleeding would behave proportionally in the same way even if the white material is 5% warmer or colder, or if light is 5% warmer or colder.
No, it does all the difference if you are using a matte (0.5, 0.5, 0.5) or matte (1.0, 1.0, 1.0). Or if you use a matte or glossy material.
Copper is copper but on what basis have chosen the material type anf the materials parameters of white material ?
We used a common material which measures close to full white, natual lime. Then you told us white in lux coresponds to 0.7. So we did.
You mention "Natural Lime" explicitly, I didn't really find a clear general information on that, so you should check for your specific case.
When moving to a higher reflectance, make sure you increase the total path depth accordingly. Inside a closed white box, there will be many diffuse interreflections. What path depth did you choose, btw?
You mention "Natural Lime" explicitly, I didn't really find a clear general information on that, so you should check for your specific case.
When moving to a higher reflectance, make sure you increase the total path depth accordingly. Inside a closed white box, there will be many diffuse interreflections. What path depth did you choose, btw?
This was my point since the begining. I am sure lot of super white materials goes above 0.7 or 0.85 of albedo reflectance.
Pure white lime look like magnesium oxide wich is above 0.85 to.
For the path deph we are on bidir 64 + 64 and already made test with 128 + 128 .
But Dade can maybe clarify if it is correct from the engine POV.
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