Roughness with inverted textures

Foundry Modo (Developed by stenson, Integrated Plugin developed by Paul Kinnane)

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riggles
Licensed Customer
Posts: 493
Joined: Mon Feb 17, 2014 3:34 pm
Location: CT, USA

I'm seeing an inconsistent behavior with inverted image textures when using power. In the example below, I have a black glossy material. The specular map is being driven by a grayscale wood texture. As you see, even when inverted, when the power of the image is reduced, it basically blends it with black (value of 0). However, when plugging the same map into the roughness channel (spec set to 1.0) the opposite seems to happen. Lowering the power on an inverted texture here blends it with white (value of 1).

The power control should reduce the roughness value just like it did when driving the specular value, regardless of whether the texture is inverted or not.
rough texture invert.jpg
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face_off
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Joined: Fri May 25, 2012 10:52 am
Location: Adelaide, Australia

The power control should reduce the roughness value just like it did when driving the specular value, regardless of whether the texture is inverted or not.
John - is this happening in Octane Standalone too? (I'm trying to work out if it is a plugin or general Octane issue).

Paul
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riggles
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Joined: Mon Feb 17, 2014 3:34 pm
Location: CT, USA

face_off wrote:
The power control should reduce the roughness value just like it did when driving the specular value, regardless of whether the texture is inverted or not.
John - is this happening in Octane Standalone too? (I'm trying to work out if it is a plugin or general Octane issue).

Paul
I exported the ORBX file into Octane Standalone. Same behavior. Perhaps a larger Octane issue.
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face_off
Octane Plugin Developer
Posts: 15716
Joined: Fri May 25, 2012 10:52 am
Location: Adelaide, Australia

I exported the ORBX file into Octane Standalone. Same behavior. Perhaps a larger Octane issue.
In that case, can you pls post that ORBX file to the Octane Standalone 2.02 release thread with details of the problem and Otoy can look into it.

Thanks

Paul
Win7/Win10/Mavericks/Mint 17 - GTX550Ti/GT640M
Octane Plugin Support : Poser, ArchiCAD, Revit, Inventor, AutoCAD, Rhino, Modo, Nuke
Pls read before submitting a support question
Kyogo
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Joined: Tue Jan 12, 2016 4:31 am

riggles wrote:I'm seeing an inconsistent behavior with inverted image textures when using power. In the example below, I have a black glossy material. The specular map is being driven by a grayscale wood texture. As you see, even when inverted, when the power of the image is reduced, it basically blends it with black (value of 0). However, when plugging the same map into the roughness channel (spec set to 1.0) the opposite seems to happen. Lowering the power on an inverted texture here blends it with white (value of 1).

The power control should reduce the roughness value just like it did when driving the specular value, regardless of whether the texture is inverted or not.
rough texture invert.jpg
This problem remain unsolved.
However, add color correction to the roughness slot, then inverted texture works normally.
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