Loading...
> >

Emissives & Color

magog_a4eb71abmagog_a4eb71ab Posts: 769
in Technical Help (nuts n bolts)

Is there any way to get the emitted light to match the color of the surface emissive shader(i.e. UV purple, green, etc.)? It seems like we're stuck with only adjusting the color temperature, 0(red) to 10k(light blue). This is rather odd since we're able to adjust colors for lights, such as spotlights.

Comments

  • kenshaw011267kenshaw011267 Posts: 3,805

    Have you tried using an emission profile that is the right color? I'm not sure if iray handles ies files with color info, that standard is fairly new, but if it does that should solve your problem.

  • magog_a4eb71abmagog_a4eb71ab Posts: 769

    I'm not sure I follow you. I use the Emissive shader and apply it to the surface, and from there, I go to the Surface tab and make adjustments to Lumens, Temperature, Base Color, etc.

  • kenshaw011267kenshaw011267 Posts: 3,805

    I almost never use emissive shaders I just make the surface emissive so maybe the shader works differently. If you make a surface into an emissive one one of the options that becomes available is loading an emission profile which accepts an ies profile which is an lighting industry standard file that describes a ight bulb. There are thousands available for free at manufacturers websites.

  • JonnyRayJonnyRay Posts: 1,744

    If you set the Emission Temperature to zero, then it will use the color that you select in Emission Color without changing it.

  • magog_a4eb71abmagog_a4eb71ab Posts: 769
    JonnyRay said:

    If you set the Emission Temperature to zero, then it will use the color that you select in Emission Color without changing it.

    This doesn't work. I've included a screenshot showing what I get using a spotlight /w 20 degree spread angle compared to what I'm getting with the emissive. Notice the ground is unaffected by the emissive, despite having the lumens set at 100k.

    Emissive1.jpg
    1186 x 458 - 127K
  • MattymanxMattymanx Posts: 6,955

    what are your settings for the emissive surface? It seems like you dont have enough power comming from it.

  • JonnyRayJonnyRay Posts: 1,744

    I'm with Matty, I'd lke to see the emissive portion of your surface settings. Also, try a render with "Scene Only" so that any environment light isn't overwhelming your emissive. I bet it is doing something just not as strongly as you would like.

  • FishtalesFishtales Posts: 6,162

    If that is the sphere in the image then what you are seeing is transmitted light from the sphere and reflected light from the ground from the spot. The spot will have fall off plus the colour of the ground will lighten the reflected light.

  • magog_a4eb71abmagog_a4eb71ab Posts: 769
    JonnyRay said:

    I'm with Matty, I'd lke to see the emissive portion of your surface settings. Also, try a render with "Scene Only" so that any environment light isn't overwhelming your emissive. I bet it is doing something just not as strongly as you would like.

    That's exactly what it was. Thanks a bunch! The ambient light from the dome(I guess) was drowning it out. I've ALWAYS wondered how to modify this. Now I know how to turn it off. My next question would be, how do I modify the strength/brightness of the surrounding ambient light?

    I'm definitely going to be having fun experimenting with emissives now. =)

    Emissive2.jpg
    1140 x 647 - 63K
  • magog_a4eb71abmagog_a4eb71ab Posts: 769

    The emissives also blend nicely, even with a strongly red spotlight shining in with a beam angle of 5. Like I said, I'm going to have some fun with this.

    Emissive3.jpg
    1052 x 666 - 72K
  • fastbike1fastbike1 Posts: 4,078

    @magog_a4eb71ab " I've ALWAYS wondered how to modify this"

    You can also change the Environment Intensity setting,

Sign In or Register to comment.