The best mtl for semi transparent panels (main light)

[Avan]

Hello guys! Working on project i face a question for fastest solution for my semi transparent paneled ceiling. As it is my main light source i need the most "transparent" and correct mtl for fastest rendering. Below i attach current mtl and couple screenshots. I also photographed some references at the street:). Should i decide between physical correct and rayswitched mtl or not?
The panels have some thickness as well. It nessesary to be for sufficient dispersion for nightlight. There is small LED platform behind each panel.

I use this https://forum.corona-renderer.com/index.php?topic=8205.0 topic as a starting point.

[mferster]

Your material looks accurate enough I think. If you want it to render faster try using a corona ray switch material with your plastic covering, plug in your material in all the slots but global illumination. That should significantly increase render speeds, but it may flatten the look a bit. You could probably get around it by applying some AO maps though.  I would say it is definitely worth experimenting with if you are doing a lot of renders.