CanvasRenderer: Added support for SphericalRefractionMapping.

src/renderers/CanvasRenderer.js

@@ -678,11 +678,23 @@ THREE.CanvasRenderer = function ( parameters ) {
 
 					patternPath( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _uv1x, _uv1y, _uv2x, _uv2y, _uv3x, _uv3y, material.envMap );
 
-				}/* else if ( material.envMap.mapping === THREE.SphericalRefractionMapping ) {
+				} else if ( material.envMap.mapping instanceof THREE.SphericalRefractionMapping ) {
 
+					_normal.copy( element.vertexNormalsModel[ uv1 ] ).applyMatrix3( _normalViewMatrix );
+					_uv1x = - 0.5 * _normal.x + 0.5;
+					_uv1y = - 0.5 * _normal.y + 0.5;
+
+					_normal.copy( element.vertexNormalsModel[ uv2 ] ).applyMatrix3( _normalViewMatrix );
+					_uv2x = - 0.5 * _normal.x + 0.5;
+					_uv2y = - 0.5 * _normal.y + 0.5;
 
+					_normal.copy( element.vertexNormalsModel[ uv3 ] ).applyMatrix3( _normalViewMatrix );
+					_uv3x = - 0.5 * _normal.x + 0.5;
+					_uv3y = - 0.5 * _normal.y + 0.5;
 
-				}*/
+					patternPath( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _uv1x, _uv1y, _uv2x, _uv2y, _uv3x, _uv3y, material.envMap );
+
+				}
 
 
 			} else {