Interior rendering - unit setup/lights

[M_SON]

Hi guys,
I have started learning 3dsMax+corona few months ago, and I still have problems reaching to a decent level for interior renderings. I know that, for a good ambiental light you have to add a lot of other lights from exterior thru the windows but I can t control them so good. Beside that, unit setup gives me headaches too, I'm trying to use metric unit setup, but from project to project looks that I have to set up different intesity for lights to reach the same ambient light.

I've uploaded a few photos; the interactive 1 and 2, to see the difference on the ceiling spots, using the same light intensity with a different unit setup, and the light intensity being 300 which is pretty much (be noted that the lamp light has vray light, maybe that's the reason why it doesn't change)
   -please give me a hint what unit setup should I use(display and system unit scale), regarding the fact that I'm importing the project from Archicad "Element types - Surfaces, and drawing unit 1000 mm";
   -and if you could give me some tips and tricks how to set up the sun, and what types/positionings of exterior extra lights should I use from exterior to get reach a similiar renderings like those from examples, and what tone mapping settings should I apply (exposure -2, highlight compress - 500, contrast -3, saturation - -0.050, this is what I use)

Thank you guys!

[maru]

I think it is expected that changing scene units (basically re-scaling the whole scene) affects the appearance of lights if they are using physical units. If a light is set to cast X intensity onto 1x1m, then it will appear much brighter if this same 1x1m area suddenly becomes a 1x1cm area. At least that's how I understand it.

Corona does not offer any kind of light metering at this point. If you want to get realistic lighting, the best method is eyeballing. You can also use this method:
Set up your Corona Camera to photographic settings that you would use in real life (e.g. iso 400, 1/50s, f 4) and adjust the intensities of your lights until you find the result realistic. Obviously this is not an accurate method, but maybe it will help you.
You can also read more about light intensity here: https://forum.corona-renderer.com/index.php?topic=23746.msg144346#msg144346

[M_SON]

thank you a lot maru, i'll try photographic to camera, hope that i'll get better results. in the meantime this is what i could get

[maru]

Remember that using the photographic controls will give you exactly the same results as using the simple EV controls, it's just a different method of doing the same thing. It's like using a digital camera in "auto" mode and in "manual" mode.
See: https://coronarenderer.freshdesk.com/support/solutions/articles/12000047043

[M_SON]

Remember that using the photographic controls will give you exactly the same results as using the simple EV controls, it's just a different method of doing the same thing. It's like using a digital camera in "auto" mode and in "manual" mode.
See: https://coronarenderer.freshdesk.com/support/solutions/articles/12000047043

thank you, helps me a lot!