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It looks like you put the reflective coated side of the acrylic facing out. While this looks pretty cool there are 2 advantages to doing it the other way (facing in). 1) The coating is usually fairly delicate and while it wont wipe off, it can be easily scratched. 2) With the coating on the inside you will get better internal reflection as the light will bounce directly off the reflective surface and not have to travel through the acrylic twice between each reflection. This should have the effect of making the reflections appear to "go deeper".