Help with cliff tiles.

[LoneAngelIbesu]

While working on ValDev, I've encountered a problem with the cliff tiles. Attached is the level I'm having trouble with. In the top right corner, you'll see that the bottom of the north-west diagonal tiles aren't finished. I can't find a way to make the shadow for these

PS: Some tiles may seem like errors (like different color shadows and such), but ValDev's tileset fixes them.