Just a fun little observation, I just reading the update on Stellar Blade 1.07. It seems that they implement a soft body simulation on the breast that makes it actually compressed and decompressed the shape of the breast in the realistic manner depends on the external object that touch the breast. So for example when Eve clutching her arms together, the breast actually compressed with her arm and not clipping through, and that makes her movement looks really sexy. Same with when she put her wrist on her breast, the breast compressed accordingly and not clipping through the wrist. Goddamn IMPRESSIVE!!
Yes we know there's already soft body simulation of breast on Illusion and Illgames games for a long time but not with this level of detail. If some of you remember, Illusion try to achieve this level of realism back in 2003 with Des Blood VR game, when they try to realistically compress and decompress breast shape according to the player's hand movement. The result, at that time, is VERY amazing, smooth, high-quality, realistic breast movement. Unfortunately it goes nowhere as it needs high computer resource (high amount of polygon, need 3-5 minutes to load the scene, and it's just a torso, not full body) at that time. They tried again with optimized codes in Oppai Slider, but the result isn't as good as Des Blood VR, because the amount of polygon on the breast is reduced. But it is fast and playable for average PC. After Oppai Slider, every Illusion games that included char customization now contain extensive breast customization, thanks to the revolutionary Oppai Slider sims and modification.
Now with the abundance of processing power of GPU, Illgames should try to revolutionize their soft body simulation again. They already achieved high degree of breast customization, but still sorely lacking on the simulation side. Breast is still heavily clipping, and it's still behaved incorrectly with the type of cloth it wears. Illgames try to mitigate this by giving player freedom to re-shape breast depends on the cloth. But still the best result can only be gained by completely re-engineered their breast soft body simulation. I hope the breakthrough achieved by Stellar Blade team inspired Illgames team to do the same. One can only hope and pray.