Can't get rid of material in an imported model

[aleksei_ovsienko]

This has been mildly annoying for a while. 
I have a bunch of models I imported from a different CAD. And when I go to change the material there's always one material that can't be deleted from the model. You just can't unassign and delete it. There's the default material from Fusion that can't be deleted. And there's this other one.
It's not a big deal. I can assign a different material anyways. It's an eyesore, that's all. Can this be helped?

https://a360.co/3J10qp7

[dsouzasujay]

Hi @aleksei_ovsienko ,

1. Go-to "Physical Material'
   
2. Right click on the material and select 'Unassign & Delete'
   

Also, If there is any appearances applied, You can select all the local bodies/components, Right click select 

[aleksei_ovsienko]

Well it's the other way around that I want it. I want to keep the pine material and get rid of all the others. And that's what it wouldn't let me do.

[dsouzasujay · Accepted solution]

Hi @aleksei_ovsienko ,

We cannot leave the default Physical material empty.

It's necessary to assign a default material when creating new entities (Ex: Solid bodies).

I recommend changing the material in the preferences, and then we should be able to delete other physical materials.