The collision for the sloped face extends a bit too far. This becomes more apparent if you have it next to a Canvas Pyramid with the same slope, when walking from the wedge to the pyramid there will be a noticeable bump.
I fixed it for the coming update.
Adding onto this thread, Canvas Sphere’s collision is too small and will result in stuff sinking beneath the surface if scaled up enough.
(the Alpaca on the right used the Copycat tool to place it and shows the difference in collision)
Also fixed, as well as the canvas pyramid. The other primitive shapes seem fine.