When the mouse hovers over a shape in the demo, it creates an image the same size as the texture and renders a radial gradient to it, gray on the mouse cursor point and fading to black on the outer edges. This image is then used as selfillumination map. Previously it created a nice effect of brightening the shape a bit under the cursor. Right now the entire shape starts to shine very brightly and there is no visible use of the passed gradient image. It kind of looks like a blank white image is used instead of the passed map.