Problem with Belly Collisions (SE)

Little Moon · January 28, 2023

Hello, friends.

So, after many years of playing on LE, I decided to switch to SE to modernize myself and take advantage of more supported mods. However, I've come across a problem that has made my transition to SE a little discouraging. I went from using CosioHD to COCO CBBE SE, and belly collisions appear to not happen with SexLab animations. No more bulging or movement.

I searched the forum but didn't really find anything close to my issue. If I missed it, I apologize for the duplicate topic. In short:

Is there a way to modify CBPC/SMP to mimic previous bulging from "large" penetrations?
Is my current body replacer (COCO CBBE) not good for belly collisions/bulging?
Or am I stupid and jacked up installation somewhere?

Dorabella · January 28, 2023

In SKSE Plugins, you have the folder HDTSkinnedMesheConfig ?

traison · January 28, 2023

Decide which route you want to go:

SMP with it's true collisions and bulging. In my experience this is harder to manage for a "fun" effect. Can be twitchy and glitchy.
CBPC with it's simulated bulging. Easier to manage, simpler implementation, can sometimes be a bit twitchy.

Little Moon · January 28, 2023

10 hours ago, ?????? 1627 said:

In SKSE Plugins, you have the folder HDTSkinnedMesheConfig ?

Yes, I have that folder installed but haven't touched it.

9 hours ago, traison said:

Decide which route you want to go:

SMP with it's true collisions and bulging. In my experience this is harder to manage for a "fun" effect. Can be twitchy and glitchy.

CBPC with it's simulated bulging. Easier to manage, simpler implementation, can sometimes be a bit twitchy.

So if I go CBPC route, do I simply have to keep messing with config files until I get the desired effect?

traison · January 28, 2023

28 minutes ago, Little Moon said:

So if I go CBPC route, do I simply have to keep messing with config files until I get the desired effect?

That's not specific to CBPC, expect that with SMP as well. This is modding, another word for hacking, not the Microsoft store. ?

Dorabella · January 29, 2023

6 hours ago, Little Moon said:

Yes, I have that folder installed but haven't touched it.

Pass me your BaseShape.xml site in that folder ? It could also have another name, or, you could have a folder named COCO , with the file you have in it

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Little Moon · January 29, 2023

6 hours ago, ?????? 1627 said:

Pass me your BaseShape.xml site in that folder ? It could also have another name, or, you could have a folder named COCO , with the file you have in it

Reveal hidden contents

Sure. I appreciate the help, by the way.

BaseShape is file within HDTSkinnedMesheConfig. BaseShape A was within the COCO subfolder.

BaseShape.xml BaseShapeA.xml

Dorabella · January 29, 2023

2 hours ago, Little Moon said:

Sure. I appreciate the help, by the way.

You do not have collisions simply because they are deactivated

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Try this . Always back up the original

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BaseShapeA.xml

Little Moon · January 29, 2023

Thank you so much! I'll give it a try.

I'm looking at the snippets you provided. If you don't mind me asking, what was edited in the file? I can't tell what values were adjusted, other than NPC Belly. I'd like to learn for future reference.

traison · January 29, 2023

WinMerge, shows you the differences between 2 files in a convenient way.

Disclaimer: I've not updated this app in probably 10 years. It may not be the same anymore. As with anything downloaded from the internet: be careful.

Dorabella · January 29, 2023

4 hours ago, Little Moon said:

I'm looking at the snippets you provided. If you don't mind me asking, what was edited in the file?

I used Notepad++ to edit . To understand what I have touched, open both the original and the modified file with the aforementioned programme

first modification . removal of blocks <!-->

Second modification, I reduced the values to the constants of bodyA="NPC Belly" bodyB="Belly"

Third modification, I reduced the values to the constants of bodyA="NPC L Pussy02" bodyB="NPC L Pussy01 and bodyA="NPC R Pussy02" bodyB="NPC R Pussy01

Before :

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After . After removing the blocks, with Notepad++ , you will see the file as in the screen presented above

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   <bone name="Belly">
       <mass>0</mass>
       <inertia x="0" y="0" z="0"/>
       <centerOfMassTransform>
           <basis x="0" y="0" z="0" w="1"/>
           <origin x="0" y="0" z="0"/>
       </centerOfMassTransform>
       <linearDamping>0</linearDamping>
       <angularDamping>0</angularDamping>
       <gravity-factor>0</gravity-factor>
       <friction>0</friction>
       <rollingFriction>0</rollingFriction>
       <restitution>0</restitution>
   </bone>

   <bone name="NPC Belly">
       <mass>5</mass>
       <inertia x="5" y="5" z="5"/>
       <centerOfMassTransform>
           <basis x="0" y="0" z="0" w="1"/>
           <origin x="0" y="0" z="-1"/>
       </centerOfMassTransform>
       <linearDamping>0</linearDamping>
       <angularDamping>0</angularDamping>
       <gravity-factor>0</gravity-factor>
       <friction>0</friction>
       <rollingFriction>0</rollingFriction>
       <restitution>0</restitution>
   </bone>

   <generic-constraint bodyA="NPC Belly" bodyB="Belly">
       <frameInB>
           <basis x="0" y="0" z="0" w="1"/>
           <origin x="0" y="0" z="0"/>
       </frameInB>
       <useLinearReferenceFrameA>false</useLinearReferenceFrameA>
       <linearLowerLimit x="-0.1" y="-2" z="-3"/>
       <linearUpperLimit x="0.1" y="2" z="3"/>
       <angularLowerLimit x="0" y="-0.02" z="0"/>
       <angularUpperLimit x="0" y="0.02" z="0"/>
       <linearStiffness x="25" y="50" z="25"/>
       <angularStiffness x="3" y="3" z="3"/>
       <linearDamping x="2" y="2" z="2"/>
       <angularDamping x="2" y="2" z="2"/>
       <linearEquilibrium x="0" y="0" z="0"/>
       <angularEquilibrium x="0" y="0" z="0"/>
       <linearBounce x="0" y="0" z="0"/>
       <angularBounce x="0" y="0" z="0"/>
   </generic-constraint>

If you want activate constants, you must first lock the bones ,

e.g. : You want to activate NPC L Thight and NPC R Tight ,

1) At the beginning of the file, you will find a list of bones

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Insert syntax  at the beginning and end of the bones you want to use

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2) Scroll through the XML until you find the bones to activate and remove all Syntax

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At the end, you will have to read something like this

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Immagine.jpg.c1cb7e2e9893fc1e73b871d05fdea9a2.jpg

When you have identified the various constants, simply remove all the <!-- -- > syntaxes.

If , shaking is generated on the body, just reduce the values of the constants ,

e.g : <linearStiffness x="60" y="250" z="400"/> change the values, removing the digits

string will become <linearStiffness x="6" y="25" z="40"/>

As an aid, you can check the log hdtSkinnedMeshPhysics you will find in Skyrim data\SKSE\Plugins

If , you read this you can ignore it, or, by reading the number of the given string, open the XML and enter the syntax

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Keep in mind that each time the game is started, the log will reset itself and the errors will be deleted .

Little Moon · January 30, 2023

I need to give this a more thorough look.

I'm assuming you had to learn this on your own as well. Any specific reference material or tutorials?

Dorabella · January 31, 2023

46 minutes ago, Little Moon said:

I'm assuming you had to learn this on your own as well. Any specific reference material or tutorials?

If they exist, I have never found any . The only one that gave me some insight was this one Skyrim SE: HDT-SMP Physics Installation MO2 Tutorial from minute 5.45 onwards .

The method described here can be applied to any type of SMP support body

traison · January 31, 2023

8 hours ago, Little Moon said:

I'm assuming you had to learn this on your own as well. Any specific reference material or tutorials?

There is no documentation in English that I know of. No reliable ones anyways. It took me maybe a week back in the day to map out SMP and create documentation for it. Testing each value one by one and making notes. Later (in the days of SE) when the source code became public I was able to map out some of the questionmarks that remained.

There is also no versioning in SMP that I know of. Meaning you might have 2 different SMP dlls that function slightly (or sometimes drasticly) different, but there is no obvious way to tell the difference by just looking at the file. This is why when I started my document, I created a versioning system: LE1, LE2, LE3, SE1, SE2, SE3, SE4 (where SE4 was a revision I made myself). These version numbers I linked to MD5 checksums of the dll, meaning by calculating that number of any given SMP dll I can tell which version it is, or if it's a new dll. You will probably only have to concern yourself with one version for now, but I'd still recommend that if you do document your findings you consider what your documentation will look like when you find a new version of SMP.

And no I will not publish this documentation, because it's not directly based on facts but rather personal observations. Observations that weren't scientifically tested. While the document could be useful, it could also create a lot of confusion. You can however ask me specific questions and I'll try to answer them.

Little Moon · January 31, 2023

Thanks, you two. I really appreciate it.

I ended up dropping COCO CBBE in the end and switched to BHUNP. I'm sure I'll have some issues with it too. We'll see when I get there.

Dorabella · February 1, 2023

8 hours ago, Little Moon said:

I ended up dropping COCO CBBE in the end and switched to BHUNP

The problem is not with the body type but with the files in use

assassin394 · February 1, 2023

The easiest way to get belly bulge for me is use CBBE 3BA. Choose the option CBPC for belly and SMP for everything during installation. And that is it.

Edited February 1, 2023 by assassin394

Little Moon · February 5, 2023

So, now I'm testing BHUNP in-game with collisions. Similarly, everything appears to work great except for the belly during certain sex animations. It doesn't appear to bulge or move. Following the examples and tips above, I am looking at the xml files now. I have tweaked the inis for CBPC already.

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If I'm wanting to belly to move with every thrust to simulate bulging penetration, is the linear and angular damping, or is it the friction settings?

traison · February 5, 2023

1 hour ago, Little Moon said:

is the linear and angular damping, or is it the friction settings?

Neither, try stiffness instead.

Dorabella · February 5, 2023

4 hours ago, Little Moon said:

If I'm wanting to belly to move with every thrust to simulate bulging penetration, is the linear and angular damping, or is it the friction settings?

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Little Moon · February 16, 2023

So, I'm back... Yeah. I also feel really stupid and likely that I wasted time for you guys.

In short: I realized I was a dumbass and confusing HDT and CBPC.

In my case, I have to tweak the CBPC config files for belly and/or each individual actor's/critter's ini file to tweak bulge/collision. Now I just have to figure out what setting specifically do it. Troll settings, for example:

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Fortunately, there is a way (apparently) to update settings live in-game w/o having to restart the game each time.

vivalamememan · April 11, 2023

On 2/16/2023 at 9:44 AM, Little Moon said:

So, I'm back... Yeah. I also feel really stupid and likely that I wasted time for you guys.

In short: I realized I was a dumbass and confusing HDT and CBPC.

So are you using CBPC instead of SMP? In CBPC, belly collision works fine for me but doesn't work at all in SMP mode.

traison · April 11, 2023

The CBPC preset files for creatures that come with ABC have a major flaw in them in that, they have non-functional values strewn all over the place. For starters, the BellyBulge values do nothing in the troll's files. The only ones that do are the ones defined in the file that applies to your character. That file may for instance start like this:

[Options]
Conditions = IsFemale()

Edit: As for reloading configs during runtime, type: cbpc reload

Edit again: As with SMP, I've also created documentation for CBPC but also again it is based on my own findings and I'm not going to release it because someone will get butthurt if there's a mistake in it. Ask me specific questions and I'll try to fill the gaps.

Edited April 11, 2023 by traison

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