What is the difference between intensity and intensity scale in Uber Environment2
Can any one be precise in explaining
1 - The difference between Intensity and intensity scale in Uber Environment2.
2 - Max error and Max Trace distance settings and its effects in rendering
3 - is there any difference in lighting/ lights effects if i Increase the size of Uber environments (i.e., sphere size from default scale 100% to 1000% or more
tnks
Post edited by Guptatsg on
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try reading Adam tutorial here
it explain all this things
and http://www.omnifreaker.com/index.php?title=UberEnvironment
I can answer question 3. The sphere is just a visual representation it has no bearing on the light at all. So scaling will not do anything. I generally hide the sphere in the Scene Pane.
thanks for the extra info Szark :)
Actually when Mapped you can see where the light will be the strongest by looking at the image on the sphere. You can then rotate the sphere and have the light fall where you want.
Which is why I shrink the sphere down to somewhere between beach ball and soccer ball size :)
There's no way to set that as default is there?
Other than editing the actual files for it...no. The size of the sphere is 'hard coded' into it.
thanks very much for your replies.
read ADAM's tutorial already, but I could not find solution for my 1st point.
I could understand the "intensity" setting i.e by increasing or decreasing the % value the light intensity/strength varies.
++++
what about the ' intensity scale', by changing the % value, which lights intensity scale effected.
In omnifreaker tutorial page its Description says only ' Light intensity multiplier '
under what circumstances we should increase or decrease the value of 'intensity scale'
hope u understand my question
thanks
Other than editing the actual files for it...no. The size of the sphere is 'hard coded' into it.
No reason you shouldn't simply shrink (or remove) the sphere and save the result as a scene subset file - that's what the initial load is.
I must admit the Intensity scale has alluded me, well the reason it is there has. It did some tests a while a go and to be honest from a Viewport difference I see no difference in render, as shown below. What I mean about seeing the difference in the viewport is that when you adjust the Light Intensity you see a visual difference in light in the scene. When adjusting the scale you don't see a change.
These 4 images are just made up of 3 primitives and Uber Outdoor Preset at the highest quality preset. Render quality low for quick rendering. As you can see the is no difference between the two pairs of images. I can use IrFanView to view image and I go flip back and forth and I see now change what so ever.
This is why I have no idea why it is there and have been searching for the answer for a while. :)
Have you tried running this tests combined with other lights, changing only the intensity scale of the light?
I noticed that if the intensity of the light set to 45 and intensity scale set to 0% will make the render look more dark ,so in daz studio 4.5 I do see different result when changing the intensity scale .
No adding another light source would deteat the purpose and not give the a clear indication on what Intensity Scale is for, that is why I didn't put another light in. Adjusting the scale won't effect other lights in the scene so I can't see it making any difference..
Also using an Intensity scale of 0% effectively turns off the light. I just tested it and it rendered totally black.
Final light color = Color * Intensity * IntensityScale.
Yes, it is a little redundant, but the main reason for the adding the control was to more easily allow for intensities > 1.
Thank you omnifreaker for confirming that.
My advice is anything lower than 100% intensity use the to main Intensity slider. The Intensity scale is handy when or if the need arsies to go above 100% intensity without blowing out the scene with light while building it.. ;)
Judging by the example picture posted by Szark, it would appear that intensity and intensity scale are multiplied to give the total light intensity. Therefore swapping their values would have no apparent effect upon a render. Intensity scale is a scalar whereas intensity is a percentage. So the final light output level is likely given by the formula: total light output = lumens x (intensity/100) x intensity scale. After that its modified by a distance falloff (how sharply it drops in total output over distance) and is multiplied by the surface color of the material, the dot product between the incoming ray and the face normal etc...
Watch how quickly light output climbs when you increase intensity scale because its multiplied from what I gather. So 1.0 light intensity scale means 1.0 x the intensity percentage 0 - 200% (which translates to a value between 0 and 2.0). So a light intensity of 5.0 and an intensity of 100% would result in a 500% light intensity (5.0 x lumens). That's what I gather from using Daz and reading this great topic here ;-)