• The rock wall is approximately periodic, and with a peculiar hexagonal layout. It should be more irregular, and variations are probably needed to make it look really good.
• The transition between rock and dirt should have rocks invading the dirt, not vice versa. Dirt invading a rock wall would be featured in a cave entrance or the like.

Ah yeah I see what you are saying, something like this more suitable?



Or is it more a case of re-think the approach entirely?

• The upper edge of the cliff is too straight to be natural. Some vegetation (grass, maybe flowers) could be irregularly distributed on the cliff face, and rocks could rise above the grass level.

yeah I haven't done the top transition yet, I mean to do a third tile for transition from ground to cliff at the top but truth be told I am not sure how I am going to do it yet, grass to cliff should be easier as I can hide the edge a little with overhanging grass but not sure how to do the plain dirt transition.

Also I do plan to do variations on the cliff face with vegetation growing out of the cliffs and whatnot but kind of want to get the fundamentals of the cliff down first.

• Grass doesn't grow in square patterns: the corners in the top left of the tileset should be rounded, like the complementary ones in the top middle.

In general, transitions between tile types (grass, dirt, rock cliff) should be placed in the middle of the tiles, not at the edges.

Personally I put the transitions closer to the edge because I want there to be a clearer sense of where the interactive areas are and where the boundaries are, but I do see what you mean as placing the transition closer to the edge doesn't leave a lot of room and does have the transition coming off as a little square especially with the grass tiles.

This is more of a sloppy quick edit but is this closer to the mark?