Describe the feature

I love using your slopped blocks to make roofs for my buildings however I feel like there are two block versions missing for making more detailed roofs. A Divided Vertical Sloped Stairs where you can make the slab part and the sloped part two different textures for being able to add details to the roof and also Half Prisms to make use of the Half Slopes for making a smaller over hang on odd number block roofs.

Divided versions of the two sloped stairs are already planned, see #368.
Half prisms sound reasonable, I'll add those to the planned blocks.