Must WebGLCubeRenderTarget.fromEquirectangularTexture use the main renderer

Questions
,
1

Hi,

beside scene.backround i must provide an own custom background cube. For this I need to transform equirectangular map to cubemap. I tried using WebGLCubeRenderTarget.fromEquirectangularTexture like in WebGLCubeMaps. Due to my viewers class structure it is very hard to provide the main renderer at the point i need to call fromEquirectangularTexture. Is it possible to use a second temporary renderer for this ? Currently the generated CubeTexture seems to be just black :frowning:

Thx
Philipp

2

Hey,

restructured to get the main renderer… still not working so might be somthing else:

      //got loaded texture here...
      if(texture.isCubeTexture){
        return texture;
      }

      let currentRenderTarget = this.#renderer.getRenderTarget();
      
      let renderTarget = new THREE.WebGLCubeRenderTarget( texture.image.height / 2);
      renderTarget.fromEquirectangularTexture( this.#renderer, texture );

      this.#renderer.setRenderTarget( currentRenderTarget );

      let cubeTexture = renderTarget.texture;
      cubeTexture.mapping = THREE.CubeReflectionMapping;
      cubeTexture.needsUpdate = true;
      return cubeTexture;

??? :grimacing:

3

No. A second renderer means a second WebGL renderering context. And it is not possible to share resources between multiple contexts. That is a WebGL limitation.

The resource in your case is a render target (or framebuffer).

4

So now i have restructured to use the main renderer but still its not working… any guess?

5

I’m not able to tell this from your code snippet. The only thing that looks wrong is:

You don’t need this line.

6

:astonished: YES! Just that line broke it!

Thanx :clap: :raised_hands: :+1: