The forum won’t let me do a search for ‘C++’ so I have to ask. Is there any guides to using Panda3D just as a C++ library? The feature lists says it’s callable from Python and C++, but there is only mention of Python here it seems.

Most people use python for panda development.

If you want to use C++, the best way to learn is to download the panda source code, which includes one C++ program (pview) that uses panda. Look at the source code for pview.