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Getting strange dark artifacts

Hello. I'm having some trouble with rendering of a PBR Brick material. My game is very dark, and the only light source is a flashlight (which is a spot light). The problem is that with some certain angles, I got really ugly artifacts on the wall, like in the following photo: alt text

Product Version: UE 4.12
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asked Jul 25 '16 at 04:54 PM in Rendering

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lacaulac
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avatar image Ed Burgess ♦♦ STAFF Jul 25 '16 at 05:27 PM

Hi Lacaulac,

I'd love to assist you with your issue but first I need some information.

First, could you upload a screenshot of your spotlight settings in the details panel (specifically with the light section and have it expanded) so I can see what settings you are using.

Second, are you using BSP (ex. cube geometry brush) or static meshes for your walls and floor/ceiling pieces?

Third, could you also upload a screenshot of the material graph for the brick.

Thank you for submitting this bug and I hope that I can help you figure this out!

Ed Burgess

avatar image lacaulac Jul 28 '16 at 07:35 PM

Hello. As I'm actually prototyping my game, I'm using BSPs for the walls. I'll upload screenshots for Spotlight settings and Brick's material graph later. Thanks by advance. lacaulac

avatar image lacaulac Jul 28 '16 at 09:24 PM

Good evening. Here are the requested screenshots: For spotlight settings: Spotlight settings

For the brick material: Brick material

Thanks for your help, lacaulac

sans titre-1.png (120.8 kB)
screenshot_2.jpg (275.9 kB)
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The issue lies with your normal map in your brick material. Open your normal map texture and follow these 2 steps:

Set the Texture Group to WorldNormalMap > Set the Compression settings to Normalmap. (I will add a screenshot highlighting these areas)

This happened because when you imported your normal map Unreal didn't recognize it as a normal map and gave it default compression settings. Just be aware while importing normal maps and make sure they get the proper settings!

I hope this helps.

Ed Burgess alt text

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answered Jul 29 '16 at 01:37 PM

avatar image lacaulac Jul 29 '16 at 01:59 PM

Thank you! It worked :D lacaulac

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