My monitor struggles with contrast, so dark things on dark backgrounds are very difficult for me to see.

When I'm building my factories, I try to extend some belts to keep track of what is coming out of my cutters/assemblers. Problem is, from a distance, if i'm working on blocks with only Black voxels, its really difficult to tell what shape it is.

Changing the shading of the belts or the Black voxels could help. Or maybe different belt skins to prevent this from becoming a problem with different color voxels.

Alternatively, a little display pop-up of objects on the belt when mousing over it (like hovering over the machines).