User story
I would like to be able to load a Zarr pyramid into Aviator, which has top levels in it that are smaller than the tile size on the lower levels. Doing so results in the image having a black box around it. The highest level of the pyramid is 1x1 pixel. I changed the canvas background-color in Avivator to white to make this clearly visible.

This black box is also present when I load a dataset without these top levels, but the black box is smaller in this case.

Preferred solution
Modify viv, such that it does not draw the black box.

Possible alternatives
An alternative solution would be to remove these top levels from the data. However, we would like to have them for a performance boost, when loading multiple pyramids at once.