Don't know how but Chinese did make some of the best video generators out there.
Any tools or web host tool that employs uncensored Kling 3.0/3.0 Omni is the closest ever you can get in terms of real graphic and physics or motions. Pollo AI used to be the playground before they tighten the restrictions on around late March 2026.

I made realistic 3 minutes (of course, stitched from multiple 15 second generated clip with audio) of Resident Evil (Ada Wong of course) NSFW parody with Kling 3.0 Omni and had 98-99% identical movements and physics with real action human motions. The pre-input images generated also on Kling 3.0 image generators with some assists from uncensored web hosted image generators to nudify the characters in particular scene with insane realistic and proportional pre-nude and post-nude output (no substantial change in body size after nude effect applied). Kling 3.0 also have insane realistic audio output, albeit depends on the prompt effectiveness. The generated audio (such as gasping, panting or moans) for intercourse scene is unexpectedly insane.

Before those, i asked Grok to generate the multi angle character sheet of Ada Wong based from RE 4 Remake template, collated into 2x3 images with from different angles and each sheet contains 1 facial expression from multiple angle (ie default face expression, post-intercourse defeated expression, painful intercourse expression, terrified expression). These image sheet collates then feed into Kling 3.0 Omni character face reference to maintain consistency. For 1 clip with 15s duration i uploaded 1 default face model collate sheet image, 2 expression collate sheet images and 1 initial scene image.