This texture was generated in Filter Forge, a Photoshop plugin that allows you to create your own filters.
I thought one of my other filter's (cracked earth) preset, the lava floor ended up looking really good so I decided to create it's own seperate filter.
If you are using this texture for a game and want to make the lava look like it's glowing, just create two different diffuse maps. One with a darker lava color and one with a brighter one.
(main preset is actually the preset from cracked earth)
Enjoy.
lava rock boiling hot burn volcano ash glow melt red rough