Setting intesity on Mesh lights seems to do little. I use the color to adjust them.
Intensity, is that the same as “LuxRender Light - Power (Watts)” in a Luxus surfaces parameter list? The parameter names are so confusing and unexplained I think we’d better be precise with this. And I have tried tweaking the colour — lighting small mesh lights on a spaceship model, I started with default settings, colour full white (255,255,255) and power 100W. Glaringly bright, so I turned the power down in stages until it was set at just 1. Not glaring any more, but still way too bright. Then I started bringing the colour values down. I ended up with RGB values of 1,1,1 and many of the lights were still too bright. That’s what I can’t understand, it just isn’t easy to control these lights.
Colour is a bit of a head-scratcher as well. Many of the lights I add a map to just wash out to a single colour, frequently white whatever colour the light’s supposed to emit. And I can’t get red lights to look red, they all come out a bilious magenta-ish shade. And I don’t know what any of the other parameters do (the LuxRender wilki is usually no help here).
Yes, I was referring to “LuxRender Light - Power (Watts)” before. I never use that setting, it never seemed to make a difference.
Here is a set of pics depicting 4 mesh lights, simple planes with the LuxRender light material added to them and simply enabled, no other setting change on the materials.
After letting the render run for a minute or so I paused it to play with the light settings in the lux gui.
Pic 1 shows how changing the “Gain” in the lights changes their illumination / intensity.
Pic 2 shows similar but differing effect, this time all lights have gain set to 1 but use color to change intensity
Pic 3 shows that if only one light is enabled then changing the values has little effect, The panel that was darkest in the previous pictures is now the only light and is therefore bright.
My suggestion is to create simple scenes with lights and experiment on how they work. The LuxRender wiki stuff is highly technical and hasn’t helped me much.
The nice thing is you can play in realtime with the lights in the Lux GUi, all day long sometimes :p
Hope that helps