three-rt-helper
WebGLRenderTarget helper for three.js : see the output in realtime in a small canvas
NPM
Try it in this jsfiddle
Setup :
npm install three-rt-helper
and
import RenderTargetHelper from 'three-rt-helper';or
<script src='https://unpkg.com/three-rt-helper'></script>Usage
const renderTargetHelper = RenderTargetHelper( renderer, myWebGLRenderTarget );
document.body.append( renderTargetHelper );
// in the render loop
renderTargetHelper.update();