I placed this Venator prop in my world which is broken up into 4 different sections. I forgot where I got it but the problem I have is that 3 out of the 4 parts disappear after a very short distance. The only part that doesn`t is the front right part. That one I can see from far away, but because all the others have a really low visibility distance, that part is the only one visible. I`ve tried altering the scene range in my world`s SKY file but that didn`t change a thing. How do I fix this?

Check to see if each mesh has a .option associated with it. You can change the lowrez behaviors by adding -lodgroup largemodel and -lodbias (number). Play around with the options till you find one tthat suits your fancy. https://sites.google.com/site/swbf2modt ... umentation
Read the section called parameters for msh.option files and also keep in mind that these values won't matter if the mesh has no lowrez.

They only have msh files. Nothing else.

They're simple enough to create. Just make a new text file and rename it to whatever.msh.option, or if you're lazy like me just copy one from somewhere else and rename it (making sure it isn't a tga.option of course).

Alright done. I`m looking at that documentation you gave me on them. I found the right parts you want me to look at, I just have no idea how to set them out.
-lodgroup <string> where do I place the numbers and do I keep the "<string>" part?
-lodbias <float> same as above. Do I keep the "<float>" part?

Nope, those just mean you replace them with your data. "String" is the programming term for text like this, and "float" is a number with a decimal point like 3.0 or whatever. So you would want to set up the lodbias line with a decimal. Set up lodgroup with the name of the group of your choosing (given your situation, I'd go with huge model).
I recommend you try these one by one though, that way if something acts up it'll be easier to figure out what is causing it.

I`ve been messing around with them. I don`t see any differences. Also sorry for late reply