Hi Michael,
The spikes that you see are the points that were stored in the Pose Morph. You might see the pattern of your non-SDS mesh in it. When I check the Unity manual, it can’t take SDS.
https://docs.unity3d.com/Manual/HOWTO-exportFBX.html
The tip from the QA UNITY that you posted is right, the Subdivision Surface needs to be baked, which obviously works.
https://help.maxon.net/us/#FFBXEXPORT-FBXEXPORT_GROUP
So you have the dog all fine in a FBX, but the Pose Morph causes trouble. The information inside of the PoseMorph hasn’t been Subdivided, well in fact it is subdivided, but not as it you need it. If you check the three models under the “Poses: Rexx_Body_All_1” and switch them one at the time to visible, you see the problem. A case for the support? I guess so.
Well, you said deadline, so let’s fix the PoseMorph.
Select the Body Object of REXX in your c4d file, with the Subdivision Surface, use cmd C and CMD (CMD drag might not give you all).
Repeat this three time (cmd V) so you have a model for all three states of your Pose Morph. Delete in each the Skin Object. The dog will move to the center of the c4d world.
Make sure all sliders of the PoseMorph are 0% (stay in animate mode for now)
Delete the first Pose Morph Tag, this is your “Base Pose”
For the second, move only the first slider “Sad Eyes” to 100%, if it looks right, delete the PoseMorph Tag.
For the third one, move only the “Sad Mouth” to 100%, as above, delete the Tag when ready.
Name all three!
Leave the Subdivision Surface in the EXACT 100% etc setting as the one you use for the body of REXX. Any difference here, and it fails.
These three will be (General: no Subdivision Surface, Geometry Bake Subdivision Surface.)
Export as FBX
Open the FBX in a new file in c4d. Open the PoseMorph in Edit mode and replace the three states with their spiky part in the Link Field of each pose.
Delete the previous spiky parts.
Save again as FBX. There should be no Subdivision Surface anymore.
It should work fine now. Testing it now again… I get sometimes mesh explosions! Because the Subdivsion Surface settings were off. So, it works fine here.
Cheers