Author Topic: problem intensity light  (Read 4585 times)

2016-10-25, 11:13:23

fabio81

  • Active Users
  • **
  • Posts: 301
    • View Profile
Hi,

I find it a problem about the intensity of the lights. usually in vray it imposed a value in lumens, and that value remains fixed regardless of the size of the light, and rightly so. In corona it is not so, if you keep a multiplier 50 in a 5x5 cm light, that value distinctly different in a 100x100 cm light.
This is critical to have a proper scale and proportion of the light intensity and it is important to have a realistic result of the scene

2016-10-25, 12:34:11
Reply #1

cecofuli

  • Active Users
  • **
  • Posts: 1492
    • View Profile
In Corona, you must to use Lumen too, and not the default units.

2016-10-25, 12:54:41
Reply #2

fabio81

  • Active Users
  • **
  • Posts: 301
    • View Profile
It is right Cecofuli, but in cinema 4d is not yet possible because it is not the function lumens but only multiplier

2016-10-25, 13:39:13
Reply #3

cecofuli

  • Active Users
  • **
  • Posts: 1492
    • View Profile
Oh, sorry, didn't see it was Cinema ^__^
You cannot do nothing. You must to wait for lumen parameter =)

2016-10-25, 14:07:16
Reply #4

fabio81

  • Active Users
  • **
  • Posts: 301
    • View Profile
Oh, sorry, didn't see it was Cinema ^__^
You cannot do nothing. You must to wait for lumen parameter =)

I hope that the team Corona add this parameter in cinema 4d

2016-11-13, 15:20:34
Reply #5

AnnoFT

  • Users
  • *
  • Posts: 1
    • View Profile
You can create an object and add it a Corona light shader, where you can adjust the intensity of a light. It's pretty like using mesh light in Arnold.

2017-04-25, 13:02:18
Reply #6

houska

  • Corona Team
  • Active Users
  • ****
  • Posts: 1452
  • Cestmir Houska
    • View Profile
Hi, the intensity parameter specifies differential radiance per meter and steradian, so of course it scales with a larger light. Right now, Corona for C4D allows you to set the light intensity in photometric units like candela, lumen or lux and these should behave correcty with scaling.