It is a flowing lava newly erupted from volcano. The condensed lava has turned black while the flowing one is still glowing and shining red on rocks.

With the sbsar file, the balance between flowing and condensed lava can be managed.

This is lava texture. It is the residues of volcano eruption. Before lava is cooled down, it is flowing down the mountain as it is a melted substance. The movement gives lava the highly folded appearance.

Red and hot flame is glowing everywhere. Some parts have a higher temperature than others.