This post literally answered all my question about blender animations with my mesh. holy damn TY!
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So, I just came across a problem. When I import my animation into roblox, only 2 keyframes get imported, and theyâre both the sameâŚI exported correctly tho. I selected my aramature and mesh, exported as fbx, made sure it was only selected objects and that the scale was 0.01, I clicked the correct file, and yet 2 keyframesâŚweird
somehow I solved my problem by selecting the children of the armature along with the armature and the mesh itselfâŚany explanation for why I wasnât able to just select the armature and the mesh itself when exporting?
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Thatâs strange, it might be possible that it only imported the children you had selected if you only had some. Otherwise Iâm not sure what would have caused it.
Thereâs some weird things going on in non-linear animation in blender, something we typically donât check before exporting. What you SHOULD see is one animation under armature, the one animation you are looking to load with your export fbx. What can happen is that animation gets stored under a part (which is parented to the armature). If you donât select the part that has the animation, there is no animation.
What you also donât want is dozens of animations showing. That can cause distortions as Roblox and blender try to mush it all together. In the picture below, the camera has a second action. I donât export the camera, so thereâs no conflict.
The last advice I can give is to name the animation/action you are trying to export something that shows up alphabetically first. I add âaaâ to the name of the action. I have pretty good luck with this.
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I did everything, but at the end, when trying to import the animation itself, I get this in the animation editor.
When I play it, nothing happens.
I tried putting the modelâs position to 0,0,0
But that didnât work.
Send a picture of exactly what you are exporting. Depending on how you did the animation, you may have to have certain things selected in the animation editor while you are exporting.
I fixed it, I think the problem was that NLA Strips were not turned on.
Thanks for the help 
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I ran into another problem, when trying to import the wings one at a time into roblox, the right wing is messed up.
But if I import both wings with their bones at the same time, the right wing doesnât have any of its bones.
Also, when I import the wings in the same FBX file, they overlap each other at first, the picture on top is what you see when I move one of the wings to the side
I did not use a mirror modifier for the wings, I used CTRL + M to mirror.
The properties of the exports are the same for both wings.
I also tried opening my right wing inside of 3d viewer, and everything is fine.
Thanks
You used a mirror modifier on the wings, but did you mirror the rig? There are certain rig properties that do not translate to FBX. I always accept my mirror modifiers before exporting (I recommending making a backup file)
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Like @GolgiToad said, make sure you apply all transforms and modifiers. Also make sure to mirror the rig as well as the model and re-parent the rig to the model.
I tried using a mirror modifier and applying the changes, but when applied, the mirror modifier is different from what it looked like before applied.
Looks like you have some unapplied rotations as well. for example, you rotated it 90, mirrored on the X (but visually it looks like it is rotated on the Y) axis, accepted, then it got rotated again (because the mirror didnât exist until you applied the modifier).
Accept the rotation, fix the modifier to mirror on the Y, not X, and then try applying the mirror.
I tried applying the rotation with CTRL + A, but it still does the same thing. Also, the mirror modifier is mirrored around a certain part of the dragon, not around the objectâs origin.
OK, that was a good step to check. For comparison, I do the mirror first, then armature on my meshes. Might make a difference? It didnât for me.
It almost has to be the armature now, but debugging that is tricky. What does your mirrored wing look like without visual representation of the armature? Turn this off.
To fix the armature, it might be a matter of removing the armature, accepting the mirror, then re-applying the armature. It might be an issue of vertex groups not being properly mirrored.
The good news is I found at one model of mine where I never accepted the mirror on the mesh. I did accept the mirrored bones and did extra vertex work to get that model functional. So it might be the final fix allows you to import both wings as a single model. Itâs not impossible!
This is what it looks like when I turn it off.
I tried removing the armature modifier, and adding a mirror modifier and applying it, and then adding the armature modifier again, but it messed up the mesh again.
I think that solves it, actually. When you add the armature modifier fresh, the only thing that should move the mesh is existing vertex groups.
Hereâs how you check that:
In Weight Paint mode, pick a vertex group that should be for one wing. We will use my ratâs ear as an example. Only one ear is red (skinned to the RatEar_R bone).
Similarly, the other ear:
If both ears are mapped to the same bone, things break fast. If the bone has moved from the vertices it was set to manipulate, everything shifts. The trick here, the left ear does not exist. Itâs still a mirror. I instead mirrored the vertex groups under âData.â There are special naming rules for mirroring. (_R and _L worked for me)
bones - Armature rotates both sides of mirrored mesh - Blender Stack Exchange
If this still doesnât work or you need help figuring out the vertex groups, Iâll happily help you continue debugging in messages. Let me know!
Is there anyway to do this but with models that donât have bones? For example, I have a plane with an ocean modifier on it. Iâve converted the modifier to keyframes and now I want to import it into roblox but since it doesnât have bones it wonât work. Anyway to fix this?
hey guys, I am continuing this topic since I have been continuously struggling with this up to an episode of several days. It is to the point where I am considering converting to the extortionate moon animator, even though Blender is superior. I have a 3D mesh with no armatures or rigs and I have made an animation. I then exported this and baked the animation via fbx. I then imported the fbx model via avatar importer(legacy) and then went to animation editor and imported the fbx animation(same file as the fbx model). When I do this, it generally comes up with two different responses, it either produces two keyframes(which do nothing) over a span of 10 frames. Or, it says that that the models are not the same then deforms the model, as well as still not playing the animation.