Ray tracing with OpenGL Compute Shaders (Part I)
An excellent first part article/tutorial of a series on 'Ray tracing with OpenGL Compute Shaders' by Kai Burjack.
Its pretty rare to find good tutorials covering such topics especially using modern OpenGL techniques.
By the end of the tutorial series its expected that you'll be able to produce cool results like the following image:
Read the full article/tutorial on the LWJGL3 wiki here