CharaStudio Penetration

ax-mmd (25)in #charastudio • 5 months ago (edited)

There are different methods you can use for the insertion of a P item, or generally keep it pointed towards a target coordinate.

I will cover the following subjects:

Dynamic Bone Collider (DBC) item targeting
Look At Basic(LookAt) item targeting
NodeConstraint Look at parent targeting
Have a vagina be reactive to a Dynamic Bone Collider (DBC)

- Dynamic Bone Collider (DBC) item targeting -

This is what I personally use most of the time for insertion. It's easy to set up and works well.

Prerequisites

You will need to use the advanced KKPE menu, right-click KKPE button to open the menu
Left-click the KKPE button for the regular menu and use option to adjust the size of the advanced menu
It requires that you use a P item that has Dynamic Bones, if it doesn't have the tab in advanced KKPE then it won't work

Usage

Add your P item and parent it to the male, almost always on the crotch. Adjust the item position as needed
Add a DBC item and parent it to the female, usually on the crotch or mouth but can vary
Set up the DBC item to only target the bones you need, then set the Bound to Inside so it acts as a magnet
Reduce the size of the DBC to be very small and position it as needed
If you intend to distribute the scene, you should disableEnable New Dynamic Bones so it doesn't pull on the hair of newly added characters

Most of the time, you can find the ideal spot for the DBC and leave it there, but nothing is preventing you from animating the DBC position to move the P item.
If you want to enable/disable the magnetic effect of the DBC, you can keyframe Collider Bound or keyframe the scale of the collider (if it's big enough, it will no longer affect the P item).

Usage +

After working with it for a bit, I found 2 optimizations to have it behave more like BetterPenetration

Make the DBC item a long bar rather than a dot
Stiffen the P item's bones using KKPE
(optional) Remove the first dynamic bone from the target list of the DBC item in KKPE (like Penis00)

This helps with clipping and prevents the P item from being too wobbly. You can extend the bar so the P item starts curving sooner.

- Look At Basic(LookAt) item targeting -

I don't have much experience with this one, so my demonstration might not be very good.

Prerequisites

You will need to use the NodeConstraint (NC) menu to bind certain elements together. The default keybind is ctrl+i
This can work with any items with FK bones; it is not limited to items with Dynamic bones

Usage

Set up your P item on the male as usual and enable FK bones in anim
Add a LookAt item and parent it at the same place as the P item
Rotate the shaft of the P item so it points to the target direction you want
Select one of the P item's bones near the root of the shaft and press F to center the camera to it
Select the LookAt item and press C to move the item to the current camera center, exactly where the P item's bone is located
Open the NC menu, select the LookAt item and set pointer as parent, then select the P item's bone and set it as child
Still in the NC menu, enable Link rotation, click Use current, then Add new. The P item bone is now bound to LookAt
Stay in the NC menu, select the LookAt item and set lookat_target as child, then select the Female target (crotch, head, etc) and set as parent
Still in the NC menu, enable only Link position, click Reset, then Add new. The target is now bound to the Female

The P item should now follow the target. You can use multiple LookAt items if you want.

- NodeConstraint `Look at parent` targeting -

A newer addition to NodeConstraint plugin, very similar to the LookAt item function

Prerequisites

You will need to use the NodeConstraint (NC) menu to bind certain elements together. The default keybind is ctrl+i
This can work with any items with FK bones; it is not limited to items with Dynamic bones

Usage

Set up your P item on the male as usual and enable FK bones in anim
In this example, I use a sphere item parented to the female as the target bone but you can target any bone you want
Rotate the shaft of the P item so it points to the target direction you want
Select one of the P item's bones near the root of the shaft, then open the NC menu and press Set as child
Select the component that has the target bone (a sphere, a character, etc), then in the NC menu select in the list the bone to target and `Set as parent
Still in the NC menu, enable Link rotation, press the arrow for more options, enable Look at parent, click Use current, then Add new.
The P item bone is now following the target bone

- BetterPenetration -

A simple method that uses a default Uncensors, but BP versions with the BetterPenetration plugin. This uses the genitals already on the characters, you can make it work partially with items but the other options are better for that.

Prerequisites

Need the BetterPenetration and Uncensor selector plugins
Both the male and the female target need to have BP
(KKS only) Might need to enable Auto-Target in BetterPenetration

Male

Female

IMPORTANT

If you want your scene to be compatible with KKS, limit your options to BP SAC Dong or BP SoS for male and BP SAC Innie or BP Profundis for female.

Usage

Enable BP options on both male and female, use any of the BP Studio options
In advanced KKPE->Dynamic Bones tab, press Force refresh list to activate the new Dynamic Bones added to the female, they should now be reactive if they were not before.
You can adjust the entry point and the end point using the entries created by BP in NodesConstraint. You can use different bones as the Parent, but don't change the Child.

- Have a vagina be reactive to a Dynamic Bone Collider (DBC) -

By default, a vagina is not reactive to a DBC. You can use one of the BP uncensors of the female to add dynamic bones

Prerequisites

You will need to use the advanced KKPE menu (check Dynamic Bone Collider (DBC) item targeting above)
Can be used regardless of the targeting method

Usage

Add a DBC item and parent it to the P item you are using
Open the advanced KKPE menu and give the DBC its shape, set it toOutside
Select the female, then in anim->Statu scroll down and set the Uncensor to one of the BP options
In advanced KKPE->Dynamic Bones tab, press Force refresh list to activate the new Dynamic Bones added to the vagina
The vagina should now be reacting to your item