You can do that in photoshop, with much better result. Also texture rendered by Fstorm wouldn't be seamless, so you'd have to render reaaally large textures, which is hardly practical. Anyways, i did the test and the answer is YES and... NO. You can render it...
1. from material editor, but it's ruined by strange artifacts
2. normally with texture assigned to a plane and with neutral lighting, but the demo has watermarks. Also it looks that there is some tonemapping applied, even if i explicitly turn it off (might be that i'm missing something there)
3. as a render element, but for some reason it has applied strange gamma (could be because it's demo, or because i'm missing something)
In any case, i don't see a point to dig into this further.