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javascriptthree.jsshadow

Artifacts in shadows, using standard MeshPhongMaterial

I'm having an issue regarding shadows. Here is an image of the problem I'm facing:

An image is waaay better than a thousand words

enter image description here

I can't understand why there are those lines there, it's supposed to be completely lit! I don't get why the actual shadows appear to be really smooth, and the borders are good enough for what I'm trying to do, but then I have those lines all over the place.

My light configuration:

var dirLight = new THREE.DirectionalLight(0xfeffaf, 1);
dirLight.position.set(dimensions.middlePoint.x, 
    dimensions.middlePoint.y + ( dimensions.lengthY / 2),
    dimensions.middlePoint.z + dimensions.lengthZ);
dirLight.target.position.set(
    dimensions.middlePoint.x, 
    dimensions.middlePoint.y, 
    dimensions.minZ);
dirLight.castShadow = true;
dirLight.shadowDarkness = 0.4;
dirLight.shadowMapWidth = 1024;
dirLight.shadowMapHeight = 1024;
dirLight.shadowCameraNear = 1;
dirLight.shadowCameraFar = dimensions.lengthY * 2;
dirLight.shadowCameraLeft = - dimensions.lengthX / 2;
dirLight.shadowCameraRight = dimensions.lengthX / 2;
dirLight.shadowCameraTop = dimensions.lengthY / 2;
dirLight.shadowCameraBottom = -dimensions.lengthY / 2;
dirLight.shadowBias = 0.0000005;
scene.add(dirLight);

And then there's my render config:

threeRender = new THREE.WebGLRenderer({ antialias: true });
threeRender.shadowMap.enabled = true;
threeRender.shadowMap.renderReverseSided = false;
threeRender.shadowMapSoft = true;
threeRender.shadowMapType = THREE.PCFSoftShadowMap;

Please let me know how can I fix this, aswell as pointing me in the right direction towards fixing it. Thank you very much.

Solution

  • Increase the value of your shadowBias. The artifact is known as shadow acne:

    enter image description here

    See this link for more details.