OpenGL Viewport w/ PBR

Smartex is an application I am creating which will hopefully use deep learning of a self-made GAN I am developing. The goal is to train the GAN to restore images and also upscale images too (the demographic is game artists, although I can see general use-cases for a tool like this). UAK will be the GUI framework I use. Here is a screengrab of what Smartex looks like so far. The implementation of the viewport is bare-bones, I'm yet to abstract away code into compartmentalized components that will together form the renderer. I'd also like to start adding buttons and tools in the GUI (working on their functionality later).