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Light power
Posted:
Tue Nov 06, 2018 10:19 amby davorin
Hello (o;
For Octane I have to use emissions on object to use as lights...
Is it normal that I need to set emission power to 100000 and more?
I thought this power was related to something like wattage...
Re: Light power
Posted:
Tue Nov 06, 2018 2:13 pmby J.C
Hi, according to manual emission power is a wattage number.
How did you setup your light in a scene? Maybe the scale is wrong.
Re: Light power
Posted:
Tue Nov 06, 2018 2:30 pmby davorin
I just added a sphere with black body emission and default values....then changed power from 100 to 100000...
The sphere is around 35cm above the plane...
Re: Light power
Posted:
Tue Nov 06, 2018 2:54 pmby J.C
Something is wrong. Can you share the scene?
Re: Light power
Posted:
Tue Nov 06, 2018 3:01 pmby davorin
Well I have the same problem with high power when I use a bitmap as light source...
Here is the sample scene...
Re: Light power
Posted:
Tue Nov 06, 2018 3:21 pmby J.C
Increase Texture value to something close to 1. This should help.
Re: Light power
Posted:
Tue Nov 06, 2018 3:27 pmby davorin
That works...thanks....whatever this field is for
Wonder why it is not set to 1 by default...
Re: Light power
Posted:
Tue Nov 06, 2018 4:05 pmby J.C
You can scale the light mesh too to increase brightness.
The texture value is:
"This setting is used to set the efficiency of the light source. This can be set to a value or a texture. Its important to keep in mind that in the real world lights are never 100% efficient at delivering the power at the specified wattage (a 100 watt light bulb does not actually deliver 100 watts of light.) The efficiency setting can be used to enter the real world values.
Re: Light power
Posted:
Tue Nov 06, 2018 4:26 pmby J.C
Re: Light power
Posted:
Tue Nov 06, 2018 5:08 pmby J.C
davorin wrote:Well I have the same problem with high power when I use a bitmap as light source...
Here is the sample scene...
In your scene there is one mistake. You need to "Apply Scale" to the mesh object so it's scale is 1. If you fix this you can use real world value efficiency values and wattage values too.