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  • How do I get rid of hot spots from mesh lights?

     Barbara updated 6 months, 3 weeks ago 3 Members · 7 Posts
  • Barbara

    December 14, 2019 at 5:36 am

    How do I keep the light but get rid of the hot spot on the wall where the mesh sphere is at? I can render and the mesh doesn’t show but the light looks like a flashlight is being shone on the wall.

    I can’t understand why the sun lights don’t work inside the set.

  • maniapete

    December 14, 2019 at 11:49 am

    A lamp act as a lamp, therefor the hot spots (if I understand correctly).
    There is also something like environment light. Light coming from all directions (light scattered sun). People use HDRI environmental maps for  that.

    The sun isn’t working because you’ve probably created a room as a box. Which is block by the box.

    To get a diffused light, draw a flat plane. With the size of the, imaginary wall, behind the camera. And add an EMISSION shader , which generates soft light. Tweak the emission strength and color.

    • Barbara

      December 14, 2019 at 4:53 pm

      “The sun isn’t working because you’ve probably created a room as a box. Which is block by the box.”

      I hadn’t thought of that. But the lamps are inside the box so I thought they’d work inside the box.


  • purbosky

    December 14, 2019 at 9:30 pm

    If you want to use the sun lamp, an easy setting to prevent the room/wall from blocking the sunrays is by deactivating the ‘shadow’ option in the object setting of the room object (under ‘ray visibility’ group). Hope this helps. Grinning

    • This reply was modified 7 months, 4 weeks ago by  purbosky.
    • Barbara

      December 15, 2019 at 10:05 pm

      Great, thanks. Can I get the sun to shine into the windows and help light the scene like that also? I am not sure if it is working or not.

      I have a bunch of spheres in this scene and another larger gothic scene and in that one things seem a bit blown out.

      • purbosky

        December 16, 2019 at 10:10 pm

        To see if the sun lamp works or not, you can delete or hide the spheres/mesh light so the only lighting comes from the sun lamp. Another alternative If you want effect like sunray from windows like in the attached image, I delete one side from the cube/room and rotate the sun lamp so that it light the room (the ‘shadow’ option on the room object need to be turned on though). If you want, the sun lamp can also rotated so that it’s perpendicular to the room opening and will light the entire room. I then use a second sun lamp with higher strength and rotate it so that the rays cast through the windows. Note that the sun lamp position doesn’t matter, only its rotation.

        • Barbara

          January 22, 2020 at 4:21 am

          Cool, thanks.

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