OpenGL PBR Renderer

Made to learn about how graphics/rendering works, this renderer supports:

• Model and texture loading during runtime

• Shader hot-loading

• HDRi support with diffuse/specular irradiance baking

• A PBR-lit shader that uses the baked irradiance maps

• A material system with JSON and a GUI to modify them in engine

• HDR rendering with bloom

• A post processing stack that uses JSON and supports custom shaders

• Directional and point lights

• Simple fog