Irrlicht vs Armory3D

Many working examples to study and learn. You can easily experiment modifying an example code to grok in full how the engine works. In the beginning of your learning curve, the example code will offer you many useful code snippets.

If you are considering writing your own engine with openGL, you might want to consider Irrlicht instead. It makes many features of any engine worth its salt easy, including events, serialization, nodes, animators, materials, logging, and animation. Bring your own sound and networking.

Especially if you compile it yourself, it can be very light in memory usage.

If you want to start game developing with C++, then Irrlicht is a good candidate since it removes most of the complications in game making in C++. It will let you obtain experience in programming and games at the same time.

This engine supports multiple formats for 3D objects and textures.

Does everything in the same application. No exporting-importing assets, make a cube, hit run, cube appears, make a character, hit run, the character appears!

Physically based
Cycles material nodes
Voxel-based global illumination
Temporal anti-aliasing
Tessellated displacement
Screen-space raymarching
HDR pipeline

Export to all platform that Kha supports.

Although the is an obvious lake of community help, it is still there if you look on the Armory forum or there discord your sure to find help for any problem you have.

Although Armory has been a little slow in the development, tutorials on YouTube are being released almost daily and the documentation is also being updated regularly.