Hydrogen just named a new physics system HDT-PE(HDT Physics Extension - ). So a very talented modder decided to make additional havok physics for it, HydrogensaysHDT is the name. But it didn't cover sexual movements, I mean breasts. We all know havok physics is quite essential when you make games. Then what is HDT-PE and HDT-SMP? What do they do? Now we know that TBBP covers BBP and TBBP is a part of XPMSE. But we call it that way to make standards to categorize skeleton types. Funny, right? But they are what they are right now. So people came up with an idea to attach additional bone to 'NPC L breast', 'NPC R breast'(These two bones are called BBP.) that would be called TBBP later which stands for Tender BBP(TBBP indicates 'NPC L breast', 'NPC R breast', 'NPC L breast01', 'NPC R breast01' in total 4 bones.). People weren't satisfied with it because apparently BBP wasn't enough to make breasts natural. BBP - Breast and Butt Physics.ĭespite BBP, female body types only have one bone each for left and right breasts. Those, pervy nerds, were so obssessed wtih breasts' movement that they started to add bones for breasts and butts. Right now we only use XPMSE as a base skeleton so let's just call it XPMSE.Īctually BBP and TBBP aren't individual, seperate bones. What does have to do with BBP or TBBP then? Well, in fact BBP, TBBP are just a mere part of the skeleton.

Your character model(CBBE, UNP, etc) needs an appropriate a skeleton.nif in order to move in the game. What is worse, you will experience CTD right after installing a wrong, incompatible skeleton.nif. Without it, your character model can't do anything. I assume you already know about what skeleton.nif does. It's a very old thing but in case some of you guys even don't understand what they are, what these things do in your game, let's head to 'skeleton' first. So, where to begin? How about we talking about bbp and tbbp first. Read slowly and steadily if you don't understand what I am talking about. This isn't going to be hard to understand I believe. Alright, considering a number of comments saying it's too difficult to select, I decided to write a short introduction what HDT is.

Install hdt physics extension