How to render to texture?

[issimissimo]

Hello, I should send the postprocessing render to a texture (V6)
I've tried in different ways:

• using the internal property "outputBuffer" ...renderTarget = composer.outputBuffer...
• using the deprecated method "createBuffer()" renderTarget = composer.createBuffer()
  but I had no luck: the texture is black.
  Could someone help me to understand how to do that?
  Really many thanks!

[vanruesc]

Related: #711

Conceptionally, in v6 you'd only use the inputBuffer and outputBuffer parameters of the render method of your custom Pass and stay within the context of that pass. In your case, it looks like you want to render something to a private render target and use that for a mesh. You can do that by simply creating a new render target like this:

this.myRenderTarget = new WebGLRenderTarget(1, 1, { depthBuffer: false });

Your custom pass should then use the setSize hook to set the resolution of that render target:

setSize(width, height) {

  this.renderTarget.setSize(width, height);

}

You can use LuminancePass as a reference. That pass exposes its render result via a getter which could then be used as a texture for your plane mesh.