Specularity/Hardness reference for Blender
Specularity/Hardness reference for Blender
I made this test image to get a feel for the range of specularity and hardness selectable from blender. Makes it easier to pick settings for say, dry silk, or slimy frogskin, etc. You can also see how specularity settings above 1.0 don't make the reflection any sharper, but the consecutive reflections get out of control quickly.
Hope this helps someone. I'm just not patient enough to do the materials in the xml by hand! Are there any other renders to reference? Like changing IOR, or transparency for example?
Hope this helps someone. I'm just not patient enough to do the materials in the xml by hand! Are there any other renders to reference? Like changing IOR, or transparency for example?
-KouOuKen
mmm that's strange!OnoSendai wrote:And what is specularity in the blender exporter?
I have a funny feeling it's fresnel_fraction, in which case, it shouldn't go above 1
I always thought that indigo specularity was taken from blender specular color!
but I did a test and I saw that it takes in consideration the specularity slider too...
so if I set spec color to 0.8 0.8 0.8 and specularity to 0.5, I get an indigo specularity of 0.203 0.203 0.203.
If I set spec color 0.8 0.8 0.8 and specularity to 2, I get an indigo specularity of 4.x 4.x 4.x
maybe an exporter bug? I'm using the last version
zuegs wrote:SpecularGain.val is not used currently and is constantly set to 1.0
so specularity is defined as following:
Red = colGamma(mat.specR*specfac)
Green = colGamma(mat.specG*specfac)
Blue = colGamma(mat.specB*specfac)
Are you sure?
I modified the script leaving
colGamma(mat.specR)*SpecularGain.val
I set a spec color of 0.4xx and hit export
in the xml I had a specularity that was roughly 0.25 times the one set in blender!
And I don't get the need to use the specfac value in that expression! it would be much more intuitive to have spec col slider --> indigo specularity
How very odd!! Last night I posted a final render inspired by exactly the same idea as this image. You can see it at this link: http://www.indigorenderer.com/joomla/in ... temId=3406
I would have done one the same as this one, but I didn't have the patience! lol
I would have done one the same as this one, but I didn't have the patience! lol
The hardest part of BEING yourself is FINDING yourself in the first place...
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@lego:
as long you have the "colGamma()" function in the formula you do a inverse gamma correction dependent of the col-exp slider in the exporter... you can set col-exp slider to 1.0 or remove "colGamma()" to match values between Blender and Indigo.
@OnoSendai:
you are right, will try to remember this for next release exporter is still very experimental
as long you have the "colGamma()" function in the formula you do a inverse gamma correction dependent of the col-exp slider in the exporter... you can set col-exp slider to 1.0 or remove "colGamma()" to match values between Blender and Indigo.
@OnoSendai:
you are right, will try to remember this for next release exporter is still very experimental
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