Clear the frame accumulator buffer.

Copy RGBA screen buffer to opengl texture.

Use a montecarlo pathtracer implementation.

Create a new opencl tracer.

Use a perspective camera for the primary ray generation stage.

Save a copy of the RGBA framebuffer.

Apply simple Reinhard tone-mapping.

The list of pluggable of stages that are used to render the scene.

Debug flags.

An alias for functions that can be used as part of the rendering pipeline.