Karniktus - Rio Morales Behind The Scenes

It's nice to do a female feature as well from time to time...

It’s always refreshing to work on another female-focused piece, even if it isn’t as popular as my futa content… or is it?

After staring at futa hotdogs for so long, animating a character without one feels like a palate cleanser. Don’t get me wrong. Futas are still my core.

Female tentacle urethral content is, I think, even rarer than futa urethral. There are a handful of examples in manga, but very little in video form. I hoped to at least make a small change there.

I plan to expand beyond just tentacles in the female urethra. I plan to add egg-laying, worms, liquid filling, and more in the future.

I chose Rio Morales as an alternative to Mileena because I liked the idea of Rio as a MILF undergoing hormonal shifts, especially in her reproductive system. That made me think, what if she got the urethral treatment?

I’d come across a lot of manga with similar ideas, which pushed me further. X‑ray shots of a thin tentacle wriggling inside the bladder, forcing intense and repeated orgasms, really got me excited.

I incorporated those ideas into this Rio Morales animation. I had fun animating her squirming as the bead‑shaped tentacle forced its way deep into her bladder. The bead shape was intentional. I wanted Rio to feel that intense pulling and inserting, with the tentacle gaping her urethra. The VA’s performance backed that up perfectly.

I originally planned urine‑colored squirt textures, but I know some viewers aren’t into that, so I changed it to something closer to a cum texture. I also added anal and nipple play for extra stimulation.

For the intro, I wanted the pacing to feel right. The idea that clicked was a ribbed tentacle starting slow and rubbing her faster and faster. I really like the opening side angle of her being rubbed, but extending it felt like dragging the scene, so I cut it short to transition to the next angle.

I initially planned a bathroom setting (hence the tiled walls), but once I started placing props, it looked more like a Lego playset than a real space.

I ended up switching to a maintenance‑area vibe with pipes and fences. I’m not sure how I landed there. I just kept placing objects until it felt right and ran with it.

I’d also planned a short separate intro. Rio fixing her face in front of a mirror, then a tentacle emerging from the toilet behind her to grab her legs, then cut. I dropped it because it introduced another animation challenge, and since the bathroom environment didn’t work, a sudden shift from bathroom to maintenance area wouldn’t make sense anyway.

That sums everything up honestly. There aren't many problems I ran into compared to the Mileena animation that I had to discuss here.

Overall, this was a fun change of animation content. Genitalia content to be specific hehehe

Thank you all for the support!