I’d use a material closer in engraving effect to acrylic; glass won’t do it. Acrylic is vaporized to an extent but glass is not. The glass just sort of shatters (which is why you want to use a coolant such as liquid dishwashing detergent on the area to be engraved). I’d recommend trying out the design on a piece of wood, tweaking, then using the acrylic. (Hello, scrap pile!)
I’ve engraved on an oven dish before, but it didn’t have any shading.