The walls contain polystyrene and fiberglass thermal insulation and are sealed externally with white glass. The internal surface is a double layer of plasterboard.

Now, we are going to add a glass effect to the copy text layer (the text layer on the top), so double click it, and add a Bevel and Emboss effect.

The observation window on the door is made of double-layer tempered glass, the material heated in the oven can be observed clearly, meanwhile, the thermal insulation is well.