What resin have you been using for the transparent casts? They look really neat, I'm on the edge of my seat to buy some
Well, I use a couple different types from different companies. A lot depends on your climate and humidity in your area, so experimenting with a few different brands isn't a bad idea. I would only recommend purchasing from companies that give detail about their products- by that I mean, I've been in art supply stores that have these translucent resins that have literally no information about the contents on the packaging, that's a big red flag for me. Most websites will also offer documentation for their products, and very specific information about what's in them, their mixing ratios, and their respective "personalities".
But to answer your question, lately I've been using Polytek resins a lot, they have been so far very enjoyable to work with.
Feel free to shoot me a PM if you're having trouble making a choice on what to buy, and do some research on what the different characteristics are, and what they mean to you (pour time, viscosity, demold time, curing temperature, etc..)
I would recommend that whatever you get, don't get a ton of it, or spend too much money. You'll learn very quickly as you work with your first resin that you might want something that behaves a little bit different, like longer working time, or lower viscosity- things like that.
Also, by my experience so far, translucent resins are more difficult to work with. They're typically much thicker liquids, which makes it much harder to get bubblefree casts even if you're degassing before pouring, and they also take a substantially longer time to cure than most opaque curing resins- and often require post curing with heat or heated molds.