Plugins [Experimental] Alternative Futa

When I added ClothSkin support, I noticed that the method I used to 'hide' parts of the skin left some gaps when simulated. In order to fix that I played around with different ways to do that. Unfortunately, they ended up corrupting the mesh and causing issues for some people.

This change reverts things back to what the process was before, but as a result AltFuta might have gaps in places when used with ClothSkin. I'll try to fix it in a later update.

• Minor fix that should fix black polygons sometimes seen in previous version.

• Now adds a storable marker that other plugins can use to detect it.
• Geometry modified to address some issues/gaps exposed by testing with ClothSim.
  • This might affect existing looks. If you have issues please let me know! ?
• Fixed distortion of pelvis mesh on reload/settings change
• Morphs zeroed on disable.

• Added penis material options as a trigger receiver
  • Will show up in the atom's trigger receivers as something like plugin#0_Stopper.AlternativeFutaPenisMaterials
• Auto-sets tesselation on pelvis and penis (if tess-enabled shader is used)
• Removing plugin zeroes morphs

Big thanks to everyone that's been flagging bugs and to everyone else for bearing with me. Update 22 had a lot of changes under the hood that made rare issues happen more reliably. I'll keep working through them as we find them.

• Improvements to collider sync after loading
• Better tesselation on initial load
  • This reduces (but does not eliminate) the small gap between the pelvis and male gens
  • You'll still need to load one of HuntingSuccubus' tesselation or subsurface scattering plugins to fix it
• Improvements to race conditions between reloading and skin vertex updates
• Fixed issue where successive reloads may alter the skin
• Stability fixes for repeated reloading of skin and plugin

• Fixed issue with skin not reloading in some scenarios.

• Refactored a lot of the initialization code.
  • A lot more of it is done synchronously and should hopefully result in fewer race conditions.
  • Might also break things. Let me know! ?
• No longer adds male genital morphs to the female morph UI.
  • Should also no longer throw "Could not find morph" errors when loading a scene.
• Now auto-enables 'use male morphs on female'
  • It will also zero out all male morphs if the setting wasn't previously set. Otherwise the 'default' male morphs would mess up the model during general use.
• Added a new morph "AltFuta Pelvis Smooth v1" that blends the gens a little better.
  • It's just a combination of built-in morphs, so it's far from perfect.
  • Works best with a Z offset of -0.0085 or so
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• Other small tweaks that I can't remember.

• Fixed bug in latest update that cause penis physics to break

• Fixed bug where testicle controls weren't enabled

• Added some fixes for AltFutas in SubScenes.
  • Thanks to @WeebUVR for flagging! Should hopefully now work in his insane scenes.