It's an openGL rendering application which combines traditional rasterization pipeline (openGL), software ray-tracing (adapted from Ray-tracing in one weekend series), and real-time ray-tracing using compute shader as accelerations.
It uses two-layered BVH acceleration for ray-object hit calculation (TLAS & BLAS), it supports meshes which can be loaded from .obj and textures from .png or .jpg. It also supports dynamic scenes with moving objects (by only updating TLAS while BLAS keeps static).
You can press 1/2/3 to switch between default rasterization/ CPU ray-tracing/ GPU accelerated ray-tracing. You can also see how TLAS volumes look like and how they update by clicking 'enable scene tick' option.
I'm likely not going to continue developing this application because I believe that RTX and Vulkan would offer superior capabilities for real-time ray tracing compared to OpenGL & compute shaders. While the TLAS-BLAS structure does provide a way to keep the scene dynamic with relatively low overhead, it limits the scene's mesh to a static structure. For example, ray tracing skeletal meshes with skinned vertices becomes impractical. I think leveraging GPU parallelization for BVH construction or directly utilizing RTX APIs might be a more effective solution.