StandardNodeMaterial's roughness does not work with environment from ReflectorNode

Description of the problem

I’m trying to add a ground to display some rough reflections of the objects.

I add a mirror ground to examples/webgl_materials_nodes.html, like that in examples/webgl_mirror_nodes.html:

var planeGeo = new THREE.PlaneBufferGeometry( 100.1, 100.1 );

// reflector/mirror plane
var geometry = new THREE.PlaneBufferGeometry( 100, 100 );
var groundMirror = new THREE.ReflectorRTT( geometry, { clipBias: 0.003, textureWidth: WIDTH, textureHeight: HEIGHT } );

var mirror = new THREE.ReflectorNode( groundMirror );

let groundMirrorMaterial = new THREE.StandardNodeMaterial();
groundMirrorMaterial.environment = mirror;
var roughness = new THREE.FloatNode( 0.2 );
groundMirrorMaterial.roughness = roughness;

var mirrorMesh = new THREE.Mesh( planeGeo, groundMirrorMaterial );
groundMirror.add( mirrorMesh );
groundMirror.rotateX( - Math.PI / 2 );
scene.add( groundMirror );

But the reflections are not affected by groundMirrorMaterial.roughness.

With groundMirrorMaterial.environment = new THREE.CubeTextureNode(cubemap);, a normal env map:

With groundMirrorMaterial.environment = mirror;, same roughness value:

Maybe it’s similiar to #14709 .

Three.js version

• Dev
• r95
• …

Browser

• All of them
• Chrome
• Firefox
• Internet Explorer

OS

• All of them
• Windows
• macOS
• Linux
• Android
• iOS

Hardware Requirements (graphics card, VR Device, …)

[sunag]

@sunag Sorry I didn’t quite understand the question.

Sorry too do not make me understand.

I already make ReflectorNode work with roughness which is the basis of issue, but the quality of blur is bad, PMREM for example create a good environment irradiance cube what is not happening here and maybe I will have to modify the shader if MaxMipLevel is not work with planar reflection like (see in roughness = 0 still remains slightly blurred). BlurNode could be a alternative to avoid mipmaps to blur but I think it is going to need many steps to irradiance, would not be good.

Code work but is not ready. https://rawgit.com/sunag/three.js/dev-mirror-roughness/examples/webgl_mirror_nodes.html

In short, it is possible fix this issue for now with this code but this will require more work to obtain good quality.

[Mugen87]

Closing since this issue is related to the old node material which has been removed with r138.