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The lights are almost gone

jason-2455927jason-2455927 Posts: 51
in The Commons
I just finished creation of a room and tried to light it up with one of either the spotlight, direct light, or the point light. I tried each one and no matter what I do it seems like I can't light the room enough. I even put the intensity of the lights to 200% at 10,000,000 luminosity. Also, before you ask, yes I made sure the lights were inside the room and not blocked by anything. I'm using iray to render. It's not COMPLETELY dark, but not nearly light enough. When I used one of the preset render options it seems to be a bit better but I don't know why. Obviously it's something in the render setting?

Comments

  • JVRendererJVRenderer Posts: 661
    edited December 2020

    Did you check your environt mode in render setting? Make sure it's not on 'sun-sky' or 'dome on;y', but on 'dome and scene'

    Somehow setting on sun n sky or dome only, DS ignores all the scene lights

    Post edited by JVRenderer on
  • jason-2455927jason-2455927 Posts: 51
    JVRenderer said:

    Did you check your environt mode in render setting? Make sure it's not on 'sun-sky' but on 'dome and scene'

    Yes it's on dome and scene. I have the environment turned off though so only my lights show. And they do, just never bright enough. I'm using the default iray render setting by the way, except with the environment turned off.
  • jason-2455927jason-2455927 Posts: 51
    One other thing I should mention is that I can see the light in perspective mode just fine, but it's just too dark rendered.
  • JVRendererJVRenderer Posts: 661

    Okay, now make sure your 'lights' are not outside the room.

    Use your top view, set in wireframe mode and zoom out.  You should be able to see where all you lights are located. If they're outside the room, move them inside. using your translation dials

  • jason-2455927jason-2455927 Posts: 51
    JVRenderer said:

    Okay, now make sure your 'lights' are not outside the room.

    Use your top view, set in wireframe mode and zoom out.  You should be able to see where all you lights are located. If they're outside the room, move them inside. using your translation dials

    Already mentioned that they are inside the room with nothing blocking them. Thanks.
  • HaruchaiHaruchai Posts: 1,980
    edited December 2020

    jason-2455927 said:

    I just finished creation of a room and tried to light it up with one of either the spotlight, direct light, or the point light. I tried each one and no matter what I do it seems like I can't light the room enough. I even put the intensity of the lights to 200% at 10,000,000 luminosity. Also, before you ask, yes I made sure the lights were inside the room and not blocked by anything. I'm using iray to render. It's not COMPLETELY dark, but not nearly light enough. When I used one of the preset render options it seems to be a bit better but I don't know why. Obviously it's something in the render setting?

    Try raising the Luminous Flux (Lumens) of a point light or spotlight. Adding a zero before the .0 should increase it enough i.e. raise it by a factor of 10.

    Post edited by Haruchai on
  • JVRendererJVRenderer Posts: 661

    Are those lights spot lights, point lights, mesh lights?
    spot light is usually pointed in one direction, so if it's not pointed to the walls, the wall will not get much illumination.
    point lights are multi-directional, but as with any light will decay with distance (inverse square law), so if you have a large room with only one light at the center, only the center get lluminated brightly, but farther to the light source it gets dimmer.
    In addtion, depending on the properties of the interior material, light luminance maybe affected as well.

    How large is the room?

  • 31415926543141592654 Posts: 975

    Hmmm ... this might not be the problem in your case, but it has happened to me so I will suggest it.

    All of your attention is on the lights ... but have you checked the camera? A couple times I was trying to squeeze as much of the room into the lens as possible (without changing the focal length of the lens) and although my viewscreen showed the room, when it renedered, it was trying to render through a cloth, or glass, or whatever it was in the way right at the border of the lens. I moved the camera ever so slightly and the scene rendered fine.

  • jason-2455927jason-2455927 Posts: 51
    Haruchai said:

    jason-2455927 said:

    I just finished creation of a room and tried to light it up with one of either the spotlight, direct light, or the point light. I tried each one and no matter what I do it seems like I can't light the room enough. I even put the intensity of the lights to 200% at 10,000,000 luminosity. Also, before you ask, yes I made sure the lights were inside the room and not blocked by anything. I'm using iray to render. It's not COMPLETELY dark, but not nearly light enough. When I used one of the preset render options it seems to be a bit better but I don't know why. Obviously it's something in the render setting?

    Try raising the Luminous Flux (Lumens) of a point light or spotlight. Adding a zero before the .0 should increase it enough i.e. raise it by a factor of 10.

    I had that at 10,000,000 and it did increase the light a tad but nothing like it should in my opinion. Also, I have used each kind of light. And yes I do have the computer plugged in lol. Sorry, I just remembered my tech support days. That's my way of saying the obvious issues of wrong light direction, them being out of the room, and not close enough to the walls are not the problem.
  • NorthOf45NorthOf45 Posts: 5,553

    Tone Mapping? Check if somehow the values are off. The default values work well for general lighting situations, but if, say, exposure value has been set too high, the scene will be darker than expected. The default values display faintly, changed values are bolder or brighter (depending on which layout you are using).

  • FauvistFauvist Posts: 2,152
    edited December 2020

    Can you change the limits on the parameters for the lights INTENSITY from 200% to 2000% or more?  Try moving or placing a light 2 feet from a wall pointing at the wall.

    Post edited by Fauvist on
  • jason-2455927jason-2455927 Posts: 51

    Ok, so this is VERY odd. I have a skylight in the roof. It have it using the glass shader so it's transparent. So I wanted to see if I could get a direct light to shine in through it (I'll explain how this effected the inside lights in a moment). It did, but the results were still dim. Then I was fooling around and lowered the Refraction index to 1 and BAM, the light had no problems being bright enough. Now, if only I could get a spotlight to work INSIDE the room without a direct light. So I deleted the direct light and setup a spotlight INSIDE the room. All of the sudden it is working great too! So I tested and set the skylight refraction index back up and tried to render again. Now it was too dark again! I don't get it... the spotlight isn't shining through the glass. Why is the surface of the glass causing this issue to it?

  • NorthOf45NorthOf45 Posts: 5,553

    Is the skylight set to Thin Walled (under Volume)? If your camera is on the "other side" of the surface, you are inside a volume with a high index of refraction, so expect funky effects.

  • BandoriFanBandoriFan Posts: 364
    edited December 2020

    Walls block so much light. I just got Interior Light Pro and it's actually pretty good so far 

    https://www.daz3d.com/interior-light-pro-for-filament-and-iray

    I did a couple of comparison renders one using it and the other default 

    Test With Interior Light Pro Resized.png
    1800 x 2340 - 6M
    Without Interior Light Pro.png
    2000 x 2600 - 7M
    Post edited by BandoriFan on
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