Hi, yes it is rendering as UltraFractal actually renders the picture and it can be rerendered, if bigger size is needed. Pure technically I'm explainig how I render and postprocess with Ultrafractal and Apophysis in my tutorial - Print Output Tutorial in the Tutorials section of my gallery.
I will need to check that out. I'm always looking to learn new techniques and technologies to add to my skill set. Your work is some of the most original I have seen anywhere. The style is something that you have truly made your own