You are just one click away from enjoying outstandingly high quality Biased and Unbiased rendering.
Corona Renderer delivers predictable, reliable, and physically plausible results with no compromises in quality. Realistic lighting and materials are yours right out of the box.
For further control, you can choose to disable caustics for individual Corona Lights, and render caustics to their own Render Element for manipulation in post processing. Caustics also respect the include/exclude lists of Corona Lights.
By default, Corona Renderer uses a slightly biased solution, very close to being unbiased but considerably reducing render times. This is the recommended solution and works without you having to do any setup whatsoever. Corona Renderer will always deliver crisp, realistic results without splotches, interpolation artifacts or any other visual imperfections.
The 4K cache uses only partial caching, so does not try to interpolate everything. While this is slower than a fully cached solution (such as irradiance caching), it does not create artifacts, only noise that eventually goes away.
The 4K cache is an ideal solution for animation, and significantly reduces flickering even when light sources or geometry are moving. This is especially important when the cache cannot be precomputed.