Well, I read on the Wiki that "if you can do ANYTHING...", so i did
I wanted it to look like cracks where the lava nearly boils out, yours look more like a deep crack filled half way with lava.
Actually I drew hard contrast tiles first, and the lava is red filling with lighten- and darken brushes. All hand made
I smoothed the borders afterwards, i just found it too disturbing since I did not intend deep cracks. Just split open surface with the lava right underneath.
I really like yours, but in my opinion, its more a straight lava canal, no random cracks where the lava is right underneath. It would make a great addition to the current cracks. Its just two different things.
I will sketch some sideviews later to give some more detail on what I mean.
//EDIT
I also dont like the lava in SOM, the bubbles look too cartoony. I guess its a matter of taste, so I used a blurry lavatile.
The problem to all is that only one tile over a large area has disadvantages, thats probably why in SOM they used two lavatiles in a pattern.
As I said, I will try to make some deep-canal lava streams later, but its really not what i intended.
Maybee you should go more into detail on the wiki about Qualitystandards and guidelines. This would prevent people like me from spending time they could have done it right the first time...
...though in my oppinion there are lots of stylemixes in the current game, and its allways a bit too much with the depth shading. Just my 2 cents.
//EDIT
I just compared the states of my tiles.
Here is the
1) tile shown in my samples above
2) the original before smoothing the edges
3) the "sharp-edge" original with a bit of "canal depth" shading