firstRenderTarget = new THREE.WebGLRenderTarget( 512, 512, { format: THREE.RGBFormat } );
var screenMaterial = new THREE.MeshBasicMaterial( { map: firstRenderTarget } );
renderer.render( scene, textureCamera, firstRenderTarget, true );
textureCamera 设置了采集场景用的相机的姿态,最终渲染的结果放在firstRenderTarget
FYI:
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