Just a quick update on my portal effect. This is just a simple emitter at the moment with it spawning the portal shader in cascade.
It's set up so that I can control the growth, edge colour intensity and the distortion on the portal interior all on the fly in cascade with a dynamic parameter. The colour of the edge is controlled by a vector parameter through a material instance.
This is only the portal right now but I'm going to give it a lot of supporting sprites to help sell the effect of it bursting into life and also some to give a bit of extra visual fidelity to the portal itself, as I feel it's a bit dull by itself. I also want to go back and add a bit more visual interest to the portal interior, like some nebula clouds to just make it look more interesting.