Chaos Corona for Cinema 4D > [C4D] Feature Requests

Real world units for Corona Light Material

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Cinemike:
As topic says - Lumen would be welcomed there :)

houska:
Thanks for the suggestion, Mike!

Unfortunately, this seems like a rather problematic thing from the perspective of user intuition. Now, I suppose you know the definition of 1 lumen, but just as a reminder for others - lumens are a unit describing total luminous output of a light source. If we allowed to set lumens as units for Corona Light Material, the actual luminosity of each light emitting object with this material would have to adapt to the size of the object.

Now, what would definitely make sense is allowing to set lux, candelas or Watts per meter squared but those are obviously not so intuitive anymore, as they are not used so much in real life.

Cinemike:

--- Quote from: houska on 2018-01-12, 11:22:13 ---... the actual luminosity of each light emitting object with this material would have to adapt to the size of the object.

--- End quote ---
But the same applies to area lights already as well, doesn't it? When they are shown in the render, depending on their size, their visible brightness changes with a constant lumen value.
Lumen could be an optional unit additional to the "default" one.

PS Vray's luminous material does have units, too (also "Lumen").

Cinemike:
Another PS: I would not mind having Candela for flames either :)

houska:
Yeah, but with the Corona light, it kind of makes sense, because what you're setting through the UI is the total luminous flux of the given light source. However, with the material, this notion does not make any sense if you only take into account the material itself.

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