Blender importer/exporter [1.7.1]

[7Soul]

I tried it out in Blender 3.4 and then 4.0 and I get this error:

[minmay]

That's fixed in version 1.7.0 of the plugin, which I uploaded a few days before your post but forgot to change the topic title ;p

[MS-Max]

Hello,
I have a problem that I haven't found anything about here yet. I am using Blender 4.0 and the Importer/Exporter 1.7.1.
When I import the undead.model into Blender and then try to export it again, even without changing it, the export fails.
The error message I get is :

ValueError: Matrix.invert(ed): matrix does not have an inverse

Can anyone help me?

[minmay]

The jaw bone in undead.model has a bizarre singular model-to-bone-space matrix that was probably a mistake by the developers:

Code: Select all

<Matrix 4x3 (-0.0000,  1.0000, -0.0047, -1.8348)
            (-1.0000, -0.0000, -0.0000,  0.0007)
            (-0.0000,  0.0047,  1.0000, -0.0092)>

Grimrock is able to tolerate this matrix, and the plugin will dutifully import it, but can't export it. As I cannot think of any situation where you'd actually want to export a singular matrix, I don't plan to ever change this; getting an error message is much better.
If you want to modify undead.model, move the tail of that bone to wherever you think it should be.

[MS-Max]

Thank you very much for your quick reply.
I have moved the tail of that bone and can now export the model. The animation of the jaw is no longer visible as it now protrudes into the head. But I think I can still fix that.
Thanks again, the answer has helped me.