ofxAssimpModelLoader - .smd and .vmt .vtf

I’m trying to load models from valve’s .smd format using ofxAssimpModeLoader

The model loads fine, but when it comes to textures I get this;

http://puu.sh/ru8FE/71608e4151.png

My data directory contains;

-data
–alyx_faceandhair.vmt
–alyx_head_normal.vtf
– etc
– etc
– alyx_reference.smd

Note, I changed the reference in the smd file from alyx_faceandhair to alyx_faceandhair.vmt to try and fix the issue, but to no avail.

Just wondering if ofxAssimpLoader supports vmt and vtf files as I can’t find much information from a google search.