Free hair model from sketchfab.com
Fibers hair - Download Free 3D model by klrxyz [94022ac] - Sketchfab
I think the depth-test gives the wrong result.
I set up my material like this , where is wrong?
mesh.castShadow = true;
mesh.receiveShadow = true;
mesh.material.alphaTest = .35;
mesh.material.side = THREE.DoubleSide;
mesh.material.depthTest = true;
mesh.material.depthFunc = THREE.LessDepth;
mesh.material.depthWrite = false;
mesh.material.flatShading = false;