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Green Bug pattern on texture

I can find green bug patterns on various places of my texture. How can I fix this please?

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Product Version: UE 4.12
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asked Jul 13 '16 at 11:51 PM in Using UE4

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TAP2
18 7 9 10

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2 answers: sort voted first

Dont worry TAP, we where all beginners at one time :)

Allright, your metallic value should be "1" and not 100. 0 means no metallic, 1 means metallic.

One-minus your specular texture, and multiply it with a 0-1 value and put it in your roughness input instead of specular. UE4 is a physically based renderer, so specular isnt as important, while roughness is the most important.

Keep in mind that 0 = off, 1 = on, and 0.5 is 50% gray.

If you use your roughness well, you might not even need the metal input :)

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answered Jul 14 '16 at 02:03 PM

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Luos
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avatar image TAP2 Jul 14 '16 at 02:20 PM

Is this right? And sorry, what do you mean by one-minus the specular texture?

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avatar image Luos Jul 14 '16 at 04:43 PM

there is a node called one-minus (hold down the O-key and left-mouse-click) which inverts values.

I personally think that you dont need the metal option, and your roughness value's need to be more soft, less black.

I also think the texture itself has some blue values.

also, make sure your specular/roughness/AO textures have SRGB turned off.

avatar image TAP2 Jul 14 '16 at 02:23 PM

I think the green bug is still there,alt text

avatar image TAP2 Jul 15 '16 at 12:42 AM

Oh, thank you very much! turning the SRGB off did the trick!!! I'm just curious, can you tell me what one-minus does? I think I needed to put the one-minus to get rid of the green bugs as well. alt text

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Hey TAP, can you show us the material setup? I think one of your values needs clamping. But I cant tell you which one.

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answered Jul 14 '16 at 11:20 AM

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Luos
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avatar image TAP2 Jul 14 '16 at 12:41 PM

Hey Luos, Thanks for helping me out! This is the material setup. I do not really know what I'm doing as I'm new to Unreal Engine. I tried to follow this link to create displacement maps but it didn't work so I made the displacement in blender and imported into UE.

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