Of the 5 or 6 art tests I've received in my career as a tech artist, this one was the most obscure. The art test consisted of creating a pipeline and a tool with some questionable assets and a few of very broadly defined features in Unity. The entire test description was 1 paragraph so when I say 'broadly defined', I mean it. Requested tool features included saving, loading, placement, editing, and randomization. The suggested time to spend was 8 hours. Perhaps I am naive but I assumed that with such a broad scope what they wanted to see was how much you could do in that amount of time - I was also told to 'just have fun with it'.