Yes, this is done with Spectral Rendering and is pretty much only used in scientific fields. It's very expensive and would be wasteful to implement in video games (even if it were possible). Even with spectral rendering, there are different methods with varying degrees of accuracy.
Good to see some Houdini love on this forum!
My current project wouldn't be possible as an indie dev without powerful procedural tools like Houdini (my city was generated by this tool). I'm currently using Nanite assets for high fidelity geometry and scaling up the scope with Houdini. There is...
Yes, the visual latency is noticeable with the temporal accumulation technique. There are similar latency issues with Lumen. I prefer NVIDIA's RTXGI (DDGI) solution which is faster even if the precision is limited. Of course, with probe-based techniques, scene authoring for each grid is going...
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