i code recently in C++ a importer of OBJ models exported with Blender that render in OpenGL/Glew with multi-texturing in MTL file, im not a great expert with OpenGL but yes i reach that objetive of render OBJ models (with rotation etc) directly with Rad Studio C++ Builder in my EXE file
Also i consider your offer of make 3D stuff in Blender so we could help us mutually
you have Discord?
This is a test i made with a building model made in Blender:
And this for example, is a phase of a game im developing in C++ Builder called Stardust