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Roughness is not working

Roughness turns material all black regardless of color. Not shininess at 0 and not solid at 1+ just all black.

Product Version: UE 4.18
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asked Jan 11 '18 at 06:53 AM in Linux

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hstone39
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2 answers: sort voted first

No, it doesn't. Show us the material setup.

alt text

edit: just noticed the ubuntu/linux tags. A setup like in the attached image renders incorrectly on your end?

capture.png (313.1 kB)
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answered Jan 11 '18 at 09:49 AM

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Everynone
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avatar image Everynone Jan 11 '18 at 07:56 PM

This is my problem. I'm using Ubuntu Linux 17.12

Is this a default material?

alt text

capture.png (16.3 kB)
avatar image hstone39 Jan 12 '18 at 05:47 AM

yes, it's the same exact default

avatar image Everynone Jan 12 '18 at 08:24 AM

One more question, does it render correctly with Roughness set to default?

I'm not entirely sure how well Linux handles UE4 these days but historically it did have issues with ShaderModel5. How up to date are your video drivers and what's the GPU?

Also, are you launching the editor with any additional parameters?

avatar image hstone39 Jan 12 '18 at 04:50 PM

No additional parameters my GPU is R9 270x 2 gb I found the problem is that when running in terminal. I get: "missing cached shader map for material"

I found that a lot of other Linux Users have problems with that too.

avatar image Everynone Jan 12 '18 at 05:25 PM

I see, consider adding a thread in the forum's Rendering section - perhaps it will attract attention of someone with in-depth knowledge of Linux UE4 conflicts.

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![alt text][1]

This is my problem. I'm using Ubuntu Linux 17.12 [1]: /storage/temp/226724-no-roughness.png

no-roughness.png (412.6 kB)
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answered Jan 11 '18 at 05:33 PM

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hstone39
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