Could I use 3D models made with other programs for my videogame?

Hi everyone! I’m new here and I have a question. To make my videogame, can I use 3D models made with other programs (for example 3ds Max or Google Sketchup or others)?
Or I must use Unity to make the 3D models?

Also, in this website, is there a section where I can download 3D models?

Unity works fine with models from other programs. Professionals usually use a program like Maya. I suggest the free program: Blender.

Not only can you, you pretty much have to use another program to make 3d models - Unity is not a modelling program, it’s a game engine. The only models you can create using Unity alone are 3d primitives - cubes, spheres, planes and the like.

Yes,but your 3d model needs to be in 3d format that is supported by unity like:obj,fbx,3ds,dae,dxf,c4d,mb,ma and other see unity manual or reference for that.

in unity you can access the asset store which provides 3D models at decent price too.