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babon/Unity efficiently convert RenderTexture to Texture3D.cs

Created August 27, 2023 10:33
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  1. babon created this gist Aug 27, 2023.
    12 changes: 12 additions & 0 deletions Unity efficiently convert RenderTexture to Texture3D.cs
    View file
    Original file line number Diff line number Diff line change
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    //input RenderTexture 'rt3D'

    Texture3D output = new Texture3D(width, height, depth, rt3D.graphicsFormat, TextureCreationFlags.None);
    //assuming rt3D format to be 8 bits
    var a = new NativeArray<byte>(width * height * depth, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
    AsyncGPUReadback.RequestIntoNativeArray(ref a, rt3D, 0, (_) =>
    {
    output.SetPixelData(a, 0);
    output.Apply(updateMipmaps: false, makeNoLongerReadable: true);
    AssetDatabase.CreateAsset(output, "Assets/3dtex.asset");
    a.Dispose();
    });