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Scene Capture Cube renders distortion in standalone preview

I'm trying to implement a reflection floor using the Vehicle C++ example. The Scene Capture Cube is mirrored underneath the camera and parented to the car like so: alt text

When playing the game in preview mode the reflection works finealt text

But when I try it out in the Standalone Game preview parts of the reflection are distortedalt text

Did I miss something or is this a bug?

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asked Oct 10 '14 at 01:41 PM in Rendering

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2 answers: sort voted first

The selected answer is wrong. While true that Reflection captures have different distortion characteristics, that doesn't affect SceneCaptureCubes nor would it explain different behavior between the editor vs. standalone.

I spent an hour debugging this and it's a known separate bug: UE4 won't realloc rendertargets > your window resolution. So if your scenecapturecube texture size > your game window resolution, you'll see artifacts. This constraint doesn't happen in the editor.

More details here: https://answers.unrealengine.com/questions/80531/scene-capture-2d-max-resolution.html

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answered Feb 01 '15 at 08:55 AM

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Ikrima Elhassan
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avatar image ultitech_David Feb 01 '15 at 11:40 AM

I appreciate you taking the time to follow up with me on this issue. It seems like this issue has been present since August. Do you know if the bug will be fixed any time soon?

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Hey ultitech_David -

This is a known limitation to Box Reflection Actors. Both the Sphere and Box Reflection Actors have limitations in what they can and cannot do. In most cases you will want to use a Sphere Reflection Actor as they produce a better (less artifact and stretched) cubmaps. For the type of reflection that you are looking for I want to point you to our reflection documentation as straight flat reflections will always have certain limitations and quality loses, https://docs.unrealengine.com/latest/INT/Engine/Rendering/LightingAndShadows/ReflectionEnvironment/index.html

Thank You

Eric Ketchum

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answered Oct 13 '14 at 06:16 PM

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Lovecraft_K ♦♦ STAFF
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avatar image ultitech_David Oct 14 '14 at 05:04 PM

Thank you for you help, I'll be sure to check it out !

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