How to make models simpler? (Sorry, there is no Gmod section ;-;)

[rapps]

So I was making a hat[filesmelt.com] for Garry's Mod and was just about to test it out in-game when I got this funny error while compiling on GUIStudioMDL 2.2:

ERROR: short conversion out of range 33792
ERROR: Aborted Processing on 'phaze\bbhat.mdl' 

Apparently models for source games aren't suppose to have more than 32767 vertices,
so how to turn my model 'simpler' again? Without redoing the entire hat..

[HellJumper]

If I recall correctly, the soldier model is only 9,000 tris. Just to put things into perspective.

There is no automatic way of redoing a hat of that size. You can do things like removing edgeloops (alt+right click to select loop > delete > edge loop), but I would just remake the hat.

[rapps]

Oh, I already got help and forgot to edit the thread

I just added a modifier 'Decimate' and went to Un-Subdivide.
It works now.