# Material Compiling Errors with Mac and Translucent SSR

**URL:** <https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011>\
**Category:** Rendering\
**Tags:** SSR, translucency, MAC, unreal-engine, question\
**Created:** [June 25, 2015, 2:39pm UTC](https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011 "2015-06-25T14:39:41Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![user37337](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@user37337](https://forums.unrealengine.com/u/user37337)\
**Post date:** [June 25, 2015, 2:39pm UTC](https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011/1 "2015-06-25T14:39:41Z")

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I have a Water Material that uses the new translucent SSR Feature. On a Windows machine all is fine. When compiling this Material on a Mac I get the following Erros:

```
[SM4] error: no matching function for call to 'reversebits(uint)'
[SM4] error: LHS of shift operator must be an integer or integer vector

```

It is OK when I cannot use this feature on Mac but it should deactivate unsupported features automatically.  
Is there any workaround for this?

I’m using UE 4.8.1

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**Author:** ![Lovecraft\_K](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Lovecraft\_K](https://forums.unrealengine.com/u/Lovecraft_K)\
**Post date:** [June 25, 2015, 7:55pm UTC](https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011/2 "2015-06-25T19:55:07Z")

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Hi -

Can you post your Material Setup? I am not getting any errors on a Mac using Translucent SSR. Also are the error messages that you are getting in the Material Editor or the Message Log for the Project itself?

Thank You

Eric Ketchum

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**Author:** ![Lovecraft\_K](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Lovecraft\_K](https://forums.unrealengine.com/u/Lovecraft_K)\
**Post date:** [June 30, 2015, 7:33pm UTC](https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011/3 "2015-06-30T19:33:54Z")

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Hi user37337,

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 -

Eric Ketchum

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**Author:** ![sustumuh](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@sustumuh](https://forums.unrealengine.com/u/sustumuh)\
**Post date:** [July 23, 2015, 2:20pm UTC](https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011/4 "2015-07-23T14:20:35Z")

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I’m getting the same thing. Happens whenever I check the “Screen space reflections” box on a translucent material using the Surface TranslucencyVolume lighting mode. Also on a mac, running UnrealEngine 4.8.2.

Dangit, thought I was going to get decent translucent materials for a second there.

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**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\
**Post date:** [July 23, 2015, 6:42pm UTC](https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011/5 "2015-07-23T18:42:24Z")

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Hey systmh,

After some investigation and testing on my end, I discovered that SSR with Translucency is limited to the SM5 Shader model. With that being said, this issue has already been reported and fixed internally UE-17817. This fix will be implemented in an upcoming release, and we appreciate you taking the time to report the issue.

Cheers,

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**Author:** ![user37337](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@user37337](https://forums.unrealengine.com/u/user37337)\
**Post date:** [July 24, 2015, 8:19am UTC](https://forums.unrealengine.com/t/material-compiling-errors-with-mac-and-translucent-ssr/323011/6 "2015-07-24T08:19:58Z")

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Thank you very much!