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Attempt to render glowing light strip at night time

Kelvin Siu

Night time rendering with glowing strip

 I am exploring night time rendering, and trying to put a 'glowing' light strip at the ground level a building to give it a 'floating' effect.

I have turned off all solar + skylights + ambient + flash in light setup.

Then I made a rentangular block with no thickness, and applied material (perspex yellow) and then in material editor changed the glow to 50 lumens.

Rendering in luxology, the yellow strip is visible and casts shadows on surrounding forms, but the effect is very blurry and pixelated - basically not very realistic.

Anybody having the same problem or have a better way in achieving what I want to do?

Thanks,

Kelvin Siu

 

  • Kelvin,

    I think the first problem is that your glowing material may not be as bright as
    you think. 50 lux (lumens per square meter) is not much brighter than a candle
    placed every meter along your rectangular surface. For comparison, a typical
    100 watt light bulb is about 1500 lumens. So if you are trying to light the
    entire scene with this glowing surface, the overall scene is going to be pretty
    dark.

    The second issue is that glowing materials don't work very well as primary
    light sources. Their light is handled as an indirect light, but as seen in
    other threads, currently appears noisy at larger distances. Glowing materials
    work best when they are close to the elements they illuminate, and also when
    other lighting will mask some of these artifacts.

    Regards,
    Pete Segal
    Development Manager, Visualization
    Bentley

  • I wonder about this.  Is it possible to manually increase sample density in glowing materials, like you can with area lights?  That way if somebody wants a really expensive glow light to do something particular with, they can have it.

     

     

  • in reply to Colin Cobb
    I agree. I'm not completely satisfied with the results of either glowing
    materials or area lights (as discussed in other threads).

    This is definitely something we need to look into further.

    Regards,
    Pete Segal
    Development Manager, Visualization
    Bentley

  • If it is at all possible to make glow material work like an emitter in Maxwell many of us wold be greatful.

    Stefano

  • Offline in reply to stonelli

    I have the same problem with glow materials.

     Pete, can you have a look at the scene stairs.pzip uploaded to the ftp site?  I am trying to illuminate this scene with candle flames using a glow material, but it looks like this:

     

     

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