Hi all,
Yes this is another question about chaos vehicle wheels falling through the ground, but yes I promise I have read the other posts as well.
I’m a bit of a beginner with blender and unreal so I’m posting this question partly in the hopes that someone knows more about this than me, partly so that if it gets answered it can help others, and partly just for my own sanity to keep track of the solutions I have tried myself.
According to most of the other posts, this is either an issue relating to the orientation of the wheel bones, or the wheel bones not being directly parented to the root bone:
And sure enough it does say to do this in the documentation so that seems fine, though I am not surprised people seem to miss it when such important information about the physics of the vehicle is in a section titled Vehicle “Art” Setup:
Numerous youtube tutorials also make this clear in their videos too, so hopefully anyone struggling with that issue will be able to find their answer.
I too fell into all the typical traps, my wheel bones weren’t oriented correctly, my root bone wasn’t oriented correctly, when I exported from blender my armature became a new root bone on import and so the wheels weren’t parented to the “real” root etc etc.
I’ve solved all of these over the last few days but my wheels are still falling through the ground..
I have 8 wheels per side (its a tank) and below is a screenshot of the hierarchy of the imported skeleton mesh in unreal so you can see that all wheel bones are parented to the root (not sure why it appended a “1” to everything on import):
Anyway point is, wheels are all parented to the root.
Now regarding orientation of bones, here is a screenshot from blender showing every bone is oriented with Z up and X forward, most importantly the root bone and wheel bones:
When I export from blender I also make sure that the X is forward and Z is up, all transformations are applied, and that Only Deform Bones is checked to make sure I don’t end up with the duplicate root problem.
So right now I am stumped, but I will record anything I try and hopefully will find a solution either from experimentation or advice from someone here.
