It doesn’t look like a transparency to me. All the movie posters I have seen are white on the back, I would think it would be obvious if this were in backwards.
Most movie posters you’d backlight like this are actually two-sided, where the back is a really dark, deep version of the poster (backwards), and the front is what you’d expect. It gives a richer color when backlit. Most posters you’ve seen were designed for retail/walls where a white background gives a brighter picture.
It doesn’t look like a transparency to me. All the movie posters I have seen are white on the back, I would think it would be obvious if this were in backwards.
Most movie posters you’d backlight like this are actually two-sided, where the back is a really dark, deep version of the poster (backwards), and the front is what you’d expect. It gives a richer color when backlit. Most posters you’ve seen were designed for retail/walls where a white background gives a brighter picture.