Hi,
First, I have to say "THANK YOU" for the work on the tile set, it is just beautiful. Until now I sticked with spacefox and its Dibojur extension but the minute I noticed your tileset I ported it to LNP and installed it on my "vanilla with extensions" version of DF together with DAS's colorset. The details are just breathtaking.
And now, as you asked for it:
While using it I noticed a few miss-alignments in the tiles. The "play make-believe" thing and the bins are well known, but I have seen the same issue with the colors also on wodden cages and seeds seem to be very dark as well. The engraved walls and normal walls seem to be the same tile information, the same goes for the engraved floors (this is not a big issue but still, it would be so nice if it would fit into the complete picture). Also, for some strange reason, the bookcases I install are just black tiles (rock material).
If I may humbly ask for something: I would love to see the bridge-tiles getting a rework to fit into the floor tiles with the same remarkable detail as the smoothed walls. I played around a little with it already and as soon as I have a possible solution I will post it here for you to have a look at it. The same with the fallen dwarfs - in spacefox the tile was a lying dwarf if a little "red" around it. In this tileset it seems to be just a normal dwarf tile, hard to distiguish from any life peasant running around.
As for the ramp discussion, I think they are fine as they are, the shadow could be a little more distinct, because with TWBT the edges of the different layers now like kind of sharp.
Please, keep up the good work and if I can be of any help with this tileset don't hesitate to ask.