I am editing an existing resource. For example, 'rough'... the control bars seem to be located at various levels appropriate for wobble, stroke, randomness, etc., but the image doesn't reflect these settings. Additionally, when I move these settings, no changes are apparent in the preview image. The changes only appear after I exit out of the sketch style editor dialogue. It doesn't seem to make a difference whether I am editing an existing resource or creating a new one.