Dragon model created with Zbrush & Topogun3, textured with Substance Painter. Environment rocks created with Houdini & Zbrush, textured in Painter. The lava texture is a free .sbsar file from substance that can be found here: https://share.substance3d.com/libraries/629
Scene assembly, rig, animation and all the fire/smoke effects were created in Houdini and rendered with Redshift. Composited with Nuke and final touches in After Effects.