Obviously not super important, but a nice feature to have would be some sort of particle emitter. A node you could spawn & then parent to something to produce an effect. I would imagine it to have at least 2 modes:

-A mode that is essentially just the cum event that characters can do. This would let us do cum stuff without directly needing to spawn a character.

-A mode that acts like steam or smoke. Something that could be used for steamy sweat & saunas, or even magic sparkles or something if we could import our own masks for the particles to use & change their coloring.

Also want to add this here instead of making a separate suggestion, but the ability to change a characters cum color with a hue selector like what eye color has would be nice. Would give more customization for alien characters with non standard fluids, or just let you do watersports or something.