Don't step into the summoning circle when summoning demons, weird shit might happen... lol
These were created as part of some experimentation I was doing in Daz Studio. My one VN game [7 Days of Sin], involves some similar concepts and I was messing around trying to come up with interesting effects for some of those scenes.
I learned a few things, and I have some plans to improve on it, but I wanted to share my results, as I think they are promising.