If you are looking for the most anatomically correct, aesthetically pleasing, and physics-friendly breast mesh currently available for The Sims 4, Sopor’s Allure is arguably the best option on the market.
Morph Consistency: It maintains the intended shape even as you use the fitness and fat sliders in Create-a-Sim (CAS). How to Install sims 4 sopors allure a revised breast mesh patched
Resource.cfg allowing subfolders.The "Revised Breast Mesh" specifically refers to Version 2.1 of this body mod. It corrected the infamous "bullet chest" look of the initial release and softened the transition between the breast and the ribcage. However, this version was released before the EA patch 1.89 (High School Years) , which overhauled how CAS (Create-a-Sim) assets handle LODs (Level of Detail). The Verdict: The New "Gold Standard" for Realism
If you tell me where you found the “Sopor’s Allure revised breast mesh patched” file (which site, what year it claims to be from), I can help you determine if it’s safe to even attempt using it. Otherwise, I strongly recommend deleting it and using a supported mod instead. Sims 4 updated to at least patch 1