# rt gpu and vraynormalmap.

**URL:** <https://forums.chaos.com/t/rt-gpu-and-vraynormalmap/58567>\
**Category:** Issues\
**Created:** [May 18, 2016, 7:37pm UTC](https://forums.chaos.com/t/rt-gpu-and-vraynormalmap/58567 "2016-05-18T19:37:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![super\_gnu](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@super\_gnu](https://forums.chaos.com/u/super_gnu)\
**Post date:** [May 18, 2016, 7:37pm UTC](https://forums.chaos.com/t/rt-gpu-and-vraynormalmap/58567/1 "2016-05-18T19:37:24Z")

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i tried using vraynormalmap with rt gpu and it behaves very strangely. its a person (renderpeople) comes with a max normal bump assigned. in vray standard i get an error about it not being a supported map type.. strangely in rt gpu i do not.

i asumed it was not working, and swapped it for a vraynormalmap. i adjusted the gamma to 1, so the neutral colour was 128,128,255 as per the help files. (it was on 2.2)

the character gets a horrible sheen all over.. (same as with gamma 2.2, no change) character is backit so i assume its doing something extreme with the normals.

in vray standard, the normal map works as expected.

in the help files vraynormalmap is listed as compatible with rt gpu.

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**Author:** ![Donfarese](https://avatars.discourse-cdn.com/v4/letter/d/a9a28c/32.png) [@Donfarese](https://forums.chaos.com/u/Donfarese)\
**Post date:** [May 19, 2016, 4:58am UTC](https://forums.chaos.com/t/rt-gpu-and-vraynormalmap/58567/2 "2016-05-19T04:58:42Z")

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This has been talked about before, RT doesn’t handle Bump correctly, I tried getting the same results from RT that I had in ADV. Always came out odd, Vlado told me to try Normal map instead but still the same issues. I still don’t think it has been fixed yet. We’ll have to wait for someone to chime in on the progress of fixing it.

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**Author:** ![Zdravko.Keremidchiev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/zdravko.keremidchiev/32/48745_2.png) [@Zdravko.Keremidchiev](https://forums.chaos.com/u/Zdravko.Keremidchiev)\
**Post date:** [May 20, 2016, 12:00pm UTC](https://forums.chaos.com/t/rt-gpu-and-vraynormalmap/58567/3 "2016-05-20T12:00:51Z")

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We are still working on it. As soon as we fix it we will post in here: [http://forums.chaosgroup.com/showthread.php?86019-Vray-RT-CPU-GPU-Bump-reflection-maps-and-SKY-Issues](http://forums.chaosgroup.com/showthread.php?86019-Vray-RT-CPU-GPU-Bump-reflection-maps-and-SKY-Issues)