Merge pull request #17186 from zeux/gltf-pointsize

GLTFLoader: Fix PointsMaterial to use pixel-sized points

examples/js/loaders/GLTFLoader.js

@@ -2140,6 +2140,7 @@ THREE.GLTFLoader = ( function () {
 				pointsMaterial.color.copy( material.color );
 				pointsMaterial.map = material.map;
 				pointsMaterial.lights = false; // PointsMaterial doesn't support lights yet
+				pointsMaterial.sizeAttenuation = false; // glTF spec says points should be 1px
 
 				this.cache.add( cacheKey, pointsMaterial );