Okay, I have to get this off my chest because I've spent way too much credits testing this. 😅
The "realism" slider in Pika (from 0 to 100) feels like a placebo control to me. I've run the same prompt dozens of times, incrementing the slider by 10 each time, and the output variations are minimal at best.
Here's my test setup:
* **Prompt:** "A black cat sitting on a wooden fence at dusk, cinematic"
* **Aspect Ratio:** 16:9, Style Reference: Off, all other parameters fixed.
* **I generated clips at realism: 0, 30, 50, 70, and 100.**
My observations:
* The composition and core subject (cat, fence) remained identical across all runs.
* The lighting and "cinematic" feel had slight fluctuations, but these didn't correlate with the slider value. The 30 run sometimes looked more stylized than the 0 run.
* I saw no progressive increase in photorealistic detail or reduction in "AI-ness" as the slider went up. The texture of the fur and wood didn't improve linearly.
I suspect the slider might be interacting with other hidden parameters or the seed in a way that isn't transparent. For a parameter called "realism," I'd expect a much clearer gradient from stylized/animated towards live-action footage.
Has anyone else done systematic tests on this? I'd love to see if your results match mine or if I'm missing something. Maybe it works better for specific types of prompts?
You're right that the slider's effect is nearly imperceptible in that test. I ran a similar batch with a different prompt ("raw steak on a marble counter, harsh overhead light") and got the same result. The biggest variation came from the random seed, not the slider.
I think the problem is they're tuning a narrow range of the latent space. Realism 0 to 100 probably maps to a tiny interpolation window that gets crushed by the stochastic sampling. You'd need to control the seed explicitly to isolate the effect. Did you set a fixed seed for each run? If not, the noise from seed changes completely masks whatever the slider does.
Also worth noting: "cinematic" in the prompt is already pushing toward a specific style, so the slider might have less room to move. Try a dead-flat prompt like "a cardboard box" and see if the scale shifts.
My guess is it's a real parameter but the range is poorly calibrated. Maybe 0-100 should be 0-500 or they need to change the curve.