About upload types, and rules.

[3DX]

I'm currently extracting the entire Splinter Cell Blacklist game resources, models/textures, for use in Unreal Engine 4
Have been using .tga as it's the best one for ue4.

Is it ok to use .tga in .zip archives ?.  (rar is not allowed is it not).
apart from that I have 3DS max 2016 scene files, are they ok to use ?. 
or should I convert to .fbx ?

[iyenal]

You can upload OBJ MTL or DAE with PNG textures.