Huge material list from other software

Can anyone tell me why I’m seeing this list in my dropdown in materials in sketchup 2023? How can I remove them?

PS this is only about half of the list… its huge

I don’t know why you are getting that long list but the first thing I would do is go to Window>Model Info>Statistics and click Purge Unused. Then check to see if the list has been reduced. If not, that would imply the materials are being used some place in the model. You’ll have to start digging, then.

The list did not shrink… Im wondering if this is a symptom/cause of my complaints recently with crashes and loading times in layout. There are no materials in the majority of the categories…

Might be.

What categories?

Can you share the file? Send it privately if you can’t make it public.

Check if this post relates to your problem:

this was the solution to this particular problem!

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It’s nice to be of help even 3 1/2 years later! Thanks for digging that up.