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Why do my materials render grey, but only when using a AO material?

I recently implemented an AO map into one of my materials. At first it was working fine when viewing the scene with detail lighting on. I quit my project and loaded it back up. Toggled detail lighting = all the geometry is flat grey. No lighting whatsoever.

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asked May 10 '14 at 04:44 AM in Bug Reports

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Hi Joshezzell,

If you can provide a little bit more information with your problem I'll see what I can do to help you out.

Have you tried opening a new level/map and are you getting the same results when doing this? Can you provide an image of your material with the node connections that is causing the issue? Can you also include an image of what's going on in the editor view window as well?

If you're okay with attaching a zip with the the level and material that is causing the issue I can gladly look at that and see if I can getting the same results more easily.

Also, I want to note that detail lighting will give a pronounced view of your normal maps. However, the AO will only appear as a soft shadowed texture on your mesh. It does not provide detail as the Normal Map would.



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answered May 12 '14 at 07:50 PM

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Tim Hobson ♦♦ STAFF
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avatar image Tim Hobson ♦♦ STAFF May 15 '14 at 08:33 PM

Hi Joshezzell,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.

Thank you!


avatar image xvampire Jan 06 '16 at 09:29 PM

hi , I have same problem also

avatar image Tim Hobson ♦♦ STAFF Jan 11 '16 at 05:39 PM


I was never able to reproduce this with any project I created. Would you be able to provide a simple blank project that reproduces this or detail your steps to recreate the issue?

Any screenshots would also be helpful.

Thank you!

avatar image divi Jun 29 '14 at 11:18 AM

https://dl.dropboxusercontent.com/u/107682595/DetailLightingIssue.png I wish i could contribute something to narrow the cause of the issue down, but it is actually the contrary for me. I have not applied AO to any of my materials at any point of working on the project and yet have the same issue as joshezzell. Here is the affected project, but since becoming aware of it I've noticed that the issue exists for other projects as well.


avatar image Tim Hobson ♦♦ STAFF Jun 30 '14 at 07:39 PM

Hi Divi,

I've tried to replicate this in another project and to see if perhaps this was just a checkbox that was adjusted or turned off. I couldn't get it to do so. When importing your assets into a new project I was able to view the Detail Lighting view mode with no problem.

If you can replicate this in another project can you post the repro steps here for me to test?

Thank you!


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