#8033 Docs: Added Hint to CanvasRenderer (#8772)

docs/api/renderers/CanvasRenderer.html

@@ -38,6 +38,7 @@
 			The "Canvas" in CanvasRenderer means it uses Canvas 2D instead of WebGL.<br /><br />
 
 			Don't confuse either CanvasRenderer with the SoftwareRenderer example, which simulates a screen buffer in a Javascript array.
+			Because the Canvas renderer is not part of the three.js core, you have to include it from /examples/js/renderers/.
 		</div>
 
 		<h2>Constructor</h2>