Example wanted, rendering with light fields

[DavidBrainard]

It would be nice to have an example scene that illustrates how RTB3 can be used to render scenes that use measured (or otherwise obtained) descriptions of the light field (for example, those made available by Debevec) as the light source.

We don't think there is any deep difficulty preventing such an application, but often light fields are specified as RGB so one would let the renderer promote the RGB to spectra.

We don't know whether PBRT or Mitsuba accept spectral specifications of light fields, but if they do then that might be useful to illustrate as well. In that case, one would have to promote RGB to spectra outside of the renderers (e.g., in Matlab) before passing them if the light fields came in RGB format.

[benjamin-heasly]

3c9cbdc73333212f14fbe1b5447a5bbe1fd68192 contains a light field rendering demo provided by Gizem Kucukoglu.

The light probe data are in Radiance / hdr / RGBE format. We still haven't tried a multi-spectral light probe.

[benjamin-heasly]

We now have a proof of concept showing that Mitsuba accepts multi-spectral inputs for light fields https://github.com/DavidBrainard/RenderToolbox3/wiki/LightFieldSphere-Example-Scene#spectral-variant

So I'm closing this issue and opening another, calling for multi-spectral light probe data: #59