From the right 3D source as it says plainly on the page and also in the brochure. So that probably means from 3D DVD/Blu-Ray and possibly if your gaming has 3D drivers etc etc .. If you're not sure about how you're going to use it and what you need to use it to the full, then talk to Epson before spending that amount on it, it won't just magically make everything 3D if that's what you're thinking.
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