Fabulosity comes at a price

Vanishing points seem to be a little underused sometimes and that helps keeping this work from looking more fake than necessary.

While it's pretty clear that the vanishing point was used, you're certainly right that they're off, but we could probably go the extra mile to make sure the blocks in the foreground also corresponds to a vanishing point.

Another idea that might be worth considering is going for outlines that isn't black. Dark outlines seem less effective the more details you have in a shape. At some point the outlines won't appear to actually belong. I like to think of it as the black outlines being more dissimilar than the shape it contains. We could probably have more convincing results if we used outlines similarly colored to what those outlines contain.

Not only that, but there are lots of colors we can use for outlines that doesn't need to be #000000, or pitch black. You could use a dark gray with a slight blue tinge, for example. You'll have more control over your works when you realize the whole range of colors we can use instead of just black.

It's also kinda funny to see Rarity explore dirt-filled caves and not use her spikey-wikey to do all the digging.

There's a lot more we can learn, but I think the idea of not using pitch black is the biggest one worth considering for now.