Le 2024-10-15 à 09:02, Chris R a écrit :
> My grandson loves to build with magnetic plastic tiles, so I decided to create a
> mansion for him...
> 
> No new techniques here, other than more experimentation with the exact distance
> isosurface functions.  The only light source is the sun.  Getting the radiosity
> to work reasonably well took a lot of experimentation.  Finding decent settings
> for the table with its bumpy surface would make the walls blotchy, so I ended up
> fiddling with just about everything.  In the end, it takes less than 12 hours to
> render, which is pretty quick for my scenes...
> 
> -- Chris R
Nice scene.

As for the performance.
Did you try this :
Add the «no_radiosity» attribute to the table. It still get illuminated 
by the radiosity.
Make a copy of the table as simple CSG with the «no_image no_shadow 
no_reflection» attributes, and a smooth surface with optionally some 
normal perturbation. Make that simplified table geometry sit just bellow 
the isosurface deepest points.

For the panels, using some normal perturbation should be almost 
indistinguishable from an isosurface while being computationally cheaper.

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