WebGLRenderer: Use correct encoding when rendering to render target

src/renderers/WebGLRenderer.js

@@ -1516,7 +1516,7 @@ function WebGLRenderer( parameters ) {
 
 			materialProperties.program = program;
 			materialProperties.uniforms = parameters.uniforms;
-			materialProperties.outputEncoding = _this.outputEncoding;
+			materialProperties.outputEncoding = parameters.outputEncoding;
 			material.program = program;
 
 		}