ARKit - ARSample - Failed to compile global shader

Development Rendering
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1

Hi,

I’ve been trying to get ARSample to run on an NVIDIA-based iMac.
A recent bug fix helped get me further along, but I’m now experiencing the following issue at ~35% Initializing while the ARSample Editor is loading.

 platform SF_METAL_SM5:
 2017-06-21 14:15:16.172068-0700 UE4Editor[9610:157830] Fatal error: [File:/Users//Projects/unreal/dev-ar-kit/UnrealEngine/Engine/Source/Runtime/Engine/Private/ShaderCompiler/ShaderCompiler.cpp] [Line: 4574] 
 Failed to compile global shader TCubeFilterPS<1>  .  Enable 'r.ShaderDevelopmentMode' in ConsoleVariables.ini for retries.

My machine:

10.12.5
 NVIDIA GeForce GT 640M 512 MB
 iMac (21.5-inch, Late 2012)
2

Attached full output log.

Also if somebody could point me in the right direction I could try to provide the actual shader compile failure message - not sure how to do that yet.

link text

3

Also attached is the output generated with r.DumpShaderDebugInfo=1

link text

4

Hi again,

some more info in case it’s helpful:
I commented out SM5 support and it got further along in the loading process and then crashed at:

[2017-07-05 02:03:03.475760-0700 UE4Editor[24789:571466] Ensure condition failed: LightAttenuation [File:/Users//Projects/unreal/dev-ar-kit/UnrealEngine/Engine/Source/Runtime/Renderer/Private/PostProcess/SceneRenderTargets.cpp][1]
5

Hi,

To work around this, you can install Xcode 9 Beta 1 and checkout b336d0941d39eb66f257154071378e47e3f0f191 from the Unreal Engine repository. Something is broken in the latest betas.

Hope that helps!

6

Thanks for the tip, but that was actually the first setup I tried. It also didn’t work. The build actually compiles fine for me, it’s a shader that fails to compile while the engine is loading.

7

Yeah, I was having the same problem. Something being compiled is incorrect, which is causing the shader to be compile incorrectly. Are you sure you tried that exact commit?

8

Interesting… I’m almost certain that was the configuration I started with. I’ll try it again as soon as I have a few hours for the recompile and I’ll report back here.
Thanks.

9

Unfortunately Xcode Beta 1 with that specific checkout didn’t work either. I got the following error instead:
Fatal error: [/dev-ar-kit/UnrealEngine/Engine/Source/Runtime/Apple/MetalRHI/Private/MetalPipeline.cpp] [Line: 714]

See the attached log for more details.

10

Following up on this… I just tried preview 17.3 and I can get much further.
The project now loads and I can preview it on my iMac, but the editor crashes when I try to Launch on an iPhone. It seems like it’s a similar crash - something having to do with shader compiling.