I don't need proof, it's a "render". All render people on DeviantArt are thieves, and it's been that way for a while. If you look at these "render" galleries, they're full of images done by different artists. All you need is two eyes and a brain to spot it. Heck, even one eye and a brain would work.
You can report if you like, but DeviantArt won't do anything if you're not the original copyright owner. They'd rather just throw their hands up in the air and say "not my problem!" instead of protecting people's copyright.
Yes it is, and it's the reason why many pixv users have closed their galleries or made them friends-only, so westerners on tumblr and DeviantArt can't steal and repost their art as renders. Nobody does anything about it on those two sites, so another community was ruined due to it. It's sad.
¿Si verdad?, no sé que pasa que los últimos renders que he hecho me han salido pixelados (y eso que los hago a pluma...) Es cierto xD, me di cuanta cuando lo acabé de cortar, pero sin contar eso el dibujo es bonito, aunque se note mucho -.-