EXR with lights

[hdri3d]

hello

I can not seem to mix a lighting environment EXR with lights!
I have a sky exr eclair that my scene and neons: materials for when I want the neon lights that cut luminiosité the sky!
like to play with all the lights?
thank you

[galinette]

Actually you can, but the light output is probably very different (your sky is probably much much more powerful than lights), and you are probably using Reinhard Tonemapping, which auto-exposes the scene. Then when you switch on the sky, the tonemapper reduces exposure a lot, making the visible output of other lights close to zero. A little bit as if you try to look at stars during the day. I think this is the n°1 question on Indigo forums! There should be a FAQ...

[CTZn]

<faq>EXR come most often individually with an arbitrary emission power. There is one light source in Indigo that comes with a calibrated power: the sun/sky system.

Use it to calibrate your lights and camera exposure, then, replace the sun/sky with your HDRI and adapt it's power to the newly calibrated lights.</faq>

Off course you can ignore this stage and do a relative lighting setup, but you may then miss a point and keep bumping into similar issues issues.

Oh and I second galinette: learning/setting lighting in Indigo with the Reinhard tonemapping turned on will turn you crazy !

[hdri3d]

thank you to both of you for this information