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Hi Paul !
I made a fresh scene with a tinted glass : with fake shadow it works.
I save my material
I opened my scene where it don't work, import my saved material : don't work.
I switch my render kernel from path tracing to direct lighting to info channel back to path tracing : it works.
Strange. But i'm happy : it works !

Best regards

Hi Paul ! What is the best method to make lights in Archicad Octane ? Is there some dedicated objets ?

For lighting, please check out the following links:

https://docs.otoy.com/ArchiCADH/ArchiCADPluginManual.htm#ArchiCAD/MeshEmitters.htm
https://docs.otoy.com/ArchiCADH/ArchiCADPluginManual.htm#ArchiCAD/ArchiCADLampsandMaterial.htm
https://docs.otoy.com/ArchiCADH/ArchiCADPluginManual.htm#ArchiCAD/BlackbodyEmission.htm
https://docs.otoy.com/ArchiCADH/ArchiCADPluginManual.htm#ArchiCAD/TextureEmission.htm
https://docs.otoy.com/ArchiCADH/ArchiCADPluginManual.htm#ArchiCAD/IESTexture.htm

Thanks

Paul

I have updated the installers at the top of this thread with:

2026.4.0.127
- Compiled with Octane 2026.4

Thanks

Paul

I have updated the installers at the top of this thread with:

2026.5 - v128
- Compiled with Octane 2026.5

Thanks

Paul

I have updated the installers at the top of this thread with:

2026.6 - v130
- Compiled with Octane 2026.6

Thanks

Paul