I didn't rotate the block, I got the original block, then got the mask for the slope,
then pasted it over the block, then I made the top of the block darker to make it
have a resemblance to the original block.
Overall, it is a nice tileset and a good cure for the cut-off you get when using the diggable sand blocks. Some darker shading on the outer sides of the 45 degree slopes would be good, though personally I can see nothing wrong with this tileset. You've done a good job with it Cloth pocket.