Camera Index Switch(RealityKit) Shader Graph Node in Reality Composer Pro does't work.

Question

Created Dec ’23

Replies 3

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In my project, i want to use new shadergraphmaterial to do the stereoscopic render, i notice that there is a node called Camera Index Switch Node can do this. But when i tried it , i found that :

It can only output Integer type value, when i change to float value , it change back again, i don't konw if it is a bug.

2. So i test this node with a IF node，i found that it output is weird. Below is zero should output，it is black but when i change to IF node，it is grey，it is neither 0 nor 1（My IF node result is TRUE result 1, FALSE result 0）

I wanna ask if this is a bug, and if this is a correct way to do the stereoscopic render.

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Answer 1

bYsdTd OP

Dec ’23

Sorry It is my fault, i have another reference material in the scene , and some node seems not below to this graph.

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Answer 2

DTS Engineer OP

Apple

Dec ’23

In my project, i want to use new shadergraphmaterial to do the stereoscopic render, i notice that there is a node called Camera Index Switch Node can do this. But when i tried it , i found that : It can only output Integer type value, when i change to float value , it change back again, i don't konw if it is a bug.

It does appear that there may be an issue where you cannot change the output type after removing a node connection. Please file a bug report for this issue using Feedback Assistant.

As a workaround, try removing the node and re-adding a Camera Index Switch node, and then set the output type you want.

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Answer 3

yngliu OP

Feb ’24

Hi!

I am looking to render 3D video from a stack of stereoscopic (left + right) frames in Apple Vision Pro. I've got 3D movies like Big Buck Bunny (https://download.blender.org/peach/bigbuckbunny_movies) and I've got the AVAssetTracks.

How do I use Camera Index Switch (RealityKit) ShaderGraph content? It's not clear how I include the Reality Composer Pro content in SwiftUI. Or do I have to render fully immersive Metal?

Thanks! Yang

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