How can you remove all light reflecting off a material?

Questions
,
1

I have some trees and the leaves reflect the sunlight in a weird way.

leaves_reflect
leaves_reflect1078×437 78.2 KB

I’d like to just remove light reflection entirely, which seems like a straightforward thing to do. I found if I add an entirely black roughnessMap then it almost works.

leaves_reflect2
leaves_reflect2995×450 74.1 KB

But there is still that one specific angle that fully reflects the light. Is there any support for what I’m asking, or do I have to monkey patch the shader for it?

Thanks guys.

2

MeshBasicMaterial might be what you want here, it will be uniformly lit regardless of lighting.

3

Well, it’s not that I don’t want the leaves to be lit by the sunlight (because that would be an issue when the game cycles to nighttime), but rather that I don’t want the leaves to reflect the light

4

you can use the MeshLamberMaterial.
It reacts to lighting but doesn’t have a specular shine.

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5

If you do not wish to lose rendering aspects of MeshPhysicalMaterial or MeshStandardMaterial.
You can disable the direct specular.

    this.material.onBeforeCompile = shader => {
      shader.fragmentShader = 
        shader.fragmentShader.replace(
          'vec3 totalSpecular = reflectedLight.directSpecular + reflectedLight.indirectSpecular;',
          'vec3 totalSpecular = reflectedLight.indirectSpecular;'
        )
    };

Source : three.js/src/renderers/shaders/ShaderLib/meshphysical.glsl.js at 87cc614d3932b85a2281d90068ddbac57712e294 · mrdoob/three.js · GitHub

1 Like