Sorry, missed that. I’ll give it a go now as I need the options, thanks! 
My particular obj files don’t have any mtl files with them and likely never will, but it should be alright.
I mean the one called “Context” which appears in a lot of calls that also have an inner and an outer object. This would be the 5th argument in this case, I’ve been passing nullptr to it but wondered what it is.
Loading the texture into a buffer might work but it still has to be parsed somehow. I have all that from the earlier attempt, just need to work through it. I guess there’s no simple solution that will just kick off a normal texture import as if it was dragged into the content browser.