More VFX here.
Here is a new explosion that I worked on in the Unreal Engine. I generated the smoke using a smoke sim in Houdini. The texture is tinted red and orange with emissive in a material in order to make it appear as fire. The rock debris from the explosion are also meshes that were generated in Houdini. The larger rocks on the ground are simply instances of a destructible mesh made out of a cylinder.