that lava shader looks nice. I'm thinking of making a lava map myself, maybe i'll use it :)

It's not a map thing, but the translucent grid on the outside of the map would look better if it were opaque.

I think something like this might replace lava texture for High or Ultra quality graphic settings:
https://www.shadertoy.com/view/Xs3BzS

I'm afraid both look too fancy for this map:
Anarchid's Lava
Ivand's Lava

Though with partial opacity, both effects look much more mild.

I just hope you make no map which kills just my FPS.

quote: I was just trying stuff. Edge detection will require a lot of changes. Texture is stretched to avoid seams.

Indeed. It's just that i think it will be much fitting with these. Primarily, i think that the difference in texture frequency between both the current lava and the lavas you tested is what's the worst part of it.

The stretching/tiling issue i think can be fixed by increasing noise frequency in the shader. Edge-detect highlighting will require a more significant modification, but i think it can be done without any true edge detect - just run a lowpass on the heightmap, then blur, then multiply.

(I wonder if lava can be made to play well with map or even dynamic lighting...)

Lava can be raised to conceal the edges by lowering the map height.