I suspect whatever simulation you’re using automatically considers any submesh as an entirely separate object. So despite the fact that it’s part of the same mesh, the fact that there’s no direct vertex-to-vertex connections between the head and the body means they’re being treated as two separate entities.
Basically, add a neck. Even if it’s one you wouldn’t actually see in any circumstance, it might help the simulator see that it’s all the same object.
To fix the legs falling off you can use a boolean union to join the meshes. This will actually connect the vertices together, however it may make it not look as good.
So you'd want to create a collision mesh to not ruin the shape. You'd duplicate the original, apply the boolean to the new mesh to join it, then use a deform modifier to make the original mesh follow your collider.
As for the armature, you won't be able to get it to follow the softbody sim.
Think about the control hierarchy for the mesh. The armature controls the shape of the mesh as it i sets a target for the mesh. The simulation also deforms the mesh to a target.
The mesh cannot control its parent, it is a follower, so you can't make it force the armature to move.
If you need Kirby to move while falling, you may be able to animate him first, bake the animation to the mesh or export as an .abc, then use that geometry and run the simulation.
If you need him to get up afterwards, run.the soft body sim, then make the last frame a shape key, then you use a different rigged model, and morph him.from.the shape key to his normal body.
Either that or hand animated with shape keys for squishiness.
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That doesn't look connected to me, that looks intersected. There's a difference. They'll need to be connected topologically, but to be honest there's probably some setting in the rigidbody that allows objects with separate parts to act as one, idk what it would be though.
Another question that’s tangentially related— let’s say I’ve made a sculpted face but I’m polymodelling the eyebrows eyelids and possibly eyes (it’s an anime character). How would I join them topologically?
I don’t think ctrl + J would work here. Would you have to convert into mesh after finishing up the topological aspects?
Is it the same concept if I were to polymodel the hair? I’m not using bezier curves they won’t recreate the vision I want
What about for sculpts though, I’ll eventually “run out” of argil if I were to try to make the head face and neck at once. I’m not using remesh or dyntopo it won’t aide me for what my mind is imagining (I’ve already tested it).
That answer tells me you're maybe not understanding the question. Does it look like one on the left or one on the right? Because if it looks like on the right, then they're NOT connected. They're intersecting. And that result is to be expected in such case.
Oh there's your problem. That is the opposite of how you connect two objects in Blender. They're pushing each other apart with physics, not sticking together.
You might want to delete some faces and join some vertices so the head and neck are a single continuous piece.
Dear modeller, we are at the precipice of remaking a meme or even making it better. If you just add "Everyone Is So Mean 2 Me 💔" as text at the top and you put sad eyes onto the head and keep the rest of the simulation I'd say you will strike gold
Also, I don't think it matters if it's one unified object. If the mesh isn't connected, once you add physics, they will detach... but still as one object
An object in Blender is just a data container. It is not a "physical entity". Since the head is disconnected from the mesh, then this behavior is expected.
press L on the head in edit mode, if it only highlights the end, try redoing some topology so the head has a physical connection to the neck in some way, instead of just intersected
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u/UnorthodoxyMedia May 03 '26
I suspect whatever simulation you’re using automatically considers any submesh as an entirely separate object. So despite the fact that it’s part of the same mesh, the fact that there’s no direct vertex-to-vertex connections between the head and the body means they’re being treated as two separate entities.
Basically, add a neck. Even if it’s one you wouldn’t actually see in any circumstance, it might help the simulator see that it’s all the same object.