Basically, I was/am thinking of having Calcinite spawn its amorphous mass of protoplasmic entrails upon death by using Silacoid's sprite in its place (which, since I don't use it for my UFO/EU mod, I figured I'd just put it to good use here). The spawned blob would then get a ranged acid (TFTD electric, but whatever) attack to compensate for Calcinite's previous melee-only limitations while in the suit.
The coding is fairly simple (use Zombie as template), I am just at a loss when it comes to adding Silacoid to the extraSprites ruleset because I really have no idea where to get it from or how to "extract" it. I mean, I know there's a SILACOID.PCK and TAB file in UFO's UNIT folder, but I don't know what to do with it or if that's all I need. I thought it wouldn't be so hard since Silacoid's sprites have already been created and it'd be just a matter of implementation.
So how hard would it be?
PS: Yes, there'd be a color mismatch between purplish Silacoid and greenish Calcinite (autopsy image), but we could just say it looks green behind the container's tinted glass
Plus, there's already other color mismatches in TFTD anyway, it's part of the charm!
PPS: I don't know how the transitional "missing frames" between Calcinite's death and Silacoid's spawning would look, but this is just all testing anyway.