I have something to test, @OlivierDambron !
If you run the “LB Versioner” to get the latest development version of the plugin, you can now connect up a .pkl file directly to the radiance recipes like so:
If you connect the model this way instead of connecting it directly to the recipe, all of the serialization process will stay in the .pkl world and you shouldn’t have any of the memory-overload issues you experienced with JSON. Let us know if you get the chance to test it with your large model and here is a sample file to show you the workflow:
annual_daylight_with_pkl.gh (60.4 KB)