"Tokyo" letters are 75mm (3") deep channel letters. "Asian Buffet" and "Welcome" letters are acrylic "pushed thru" an opaque aluminum background, and project about 15mm (5/8") from the background. When illuminated, they all look very similar.
Another example of "Push-Thru" letters on an opaque (red) background, with a Day - Night comparison.
Close-up of an acrylic "push-thru" letter. Note the projection and clear edge of the acrylic thru the background panel.