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Real Lights For DAZ Studio Iray - Headlight/Foglight Settings...

XenomorphineXenomorphine Posts: 2,421
in The Commons

For those who also have this product, which setting would you recommend for headlights and, alternatively, foglights on vehicles? I've been experimenting with them, but I'm not quite sure which of them looks 'right' for either respective example.

Continuously impressed by the realism of this product!

Comments

  • RogerbeeRogerbee Posts: 4,460

    Headlights/Foglights, I'd say the 40w bulb will do. Spotlights, mmm, maybe 100w as they tend to be brighter.

    CHEERS!

  • FishtalesFishtales Posts: 6,212

    If the headlights on the car have bulbs I would use an the Emissive Shader on them and set them to 65 watts at 7500 temp. Either that or look up some Automotive bulbs and set it for the ones that you like. You will probably have to use the glass shader on the glass of the lights, not the bulb, to let the light pass through.

  • RogerbeeRogerbee Posts: 4,460

    I looked up automotive bulbs and 40w was the closest I could find, so long as there are lights there I don't think anyone will be that picky over wattages.

    CHEERS!

  • Male-M3diaMale-M3dia Posts: 3,584

    I found someone made an IES profile for a headlight here, just copy it in a text editor... Also checking manufacturer web sites for IES profiles for lights can get files that you can plug into photometric lights and emission surfaces that should simulate what you're looking for.

     

    http://forums.cgsociety.org/archive/index.php?t-213932.html

  • ToborTobor Posts: 2,300
    edited October 2015

    Just going by the wattage or profile of the bulb itself isn't going to cut it. Car lights use reflectors, Fresnel lenses, lenticular lenses, and other optical mechanics to make the bulb brighter and the lighted area larger. The effect of the reflectors and lensing is part of the look. If you want absolute realism, you'll have to duplicate this as well as a "light texture." Most real headlights use reflective rings around the outside of the bulb to increase visibility, and light from the rings and other external surfaces looks different from light from the main part of the lamp.

    Post edited by Tobor on
  • FishtalesFishtales Posts: 6,212

    Headlights are 55 Watts some are 60/55. I got the temp wrong it should be 4500 with an efficacy of 30 to 76 depending on the type of bulb used.

  • XenomorphineXenomorphine Posts: 2,421

    Useful stuff!

    How does one use an IES profile with a photometric light in DS? Select the light and then use 'import'?

  • SpottedKittySpottedKitty Posts: 7,232
    Xenomorphine said:
    How does one use an IES profile with a photometric light in DS? Select the light and then use 'import'?

    Add a Point or Linear Point light, then look at the Parameters tab. There's a parameter "Light Profile (IES)" where you can browse to your IES file, just as if it were a texture file.

  • ToborTobor Posts: 2,300
    Xenomorphine said:

    How does one use an IES profile with a photometric light in DS? Select the light and then use 'import'?

    What automobile are you modeling? Most modern cars don't use sealed beam headlights, so you need to model the headlamp assembly if it's not already there, which includes front lens, rear reflector, any additional chrome around the outside, and of course, the bulb itself (usually halogen). Otherwise it's not going to look as realistic as you may want. For the bulb use a point light and play with some narrow-beam profiles.

    If you're modeling an older car with a sealed beam lamp, you might be better off using an emissive surface, and settling for whatever extra render time that might entail. Meshes can also accept IES profiles.

  • ronmolinaronmolina Posts: 118
    Tobor said:

    Just going by the wattage or profile of the bulb itself isn't going to cut it. Car lights use reflectors, Fresnel lenses, lenticular lenses, and other optical mechanics to make the bulb brighter and the lighted area larger. The effect of the reflectors and lensing is part of the look. If you want absolute realism, you'll have to duplicate this as well as a "light texture." Most real headlights use reflective rings around the outside of the bulb to increase visibility, and light from the rings and other external surfaces looks different from light from the main part of the lamp.

    You are so right about this.

  • DAZ_SpookyDAZ_Spooky Posts: 3,100
    ronmolina said:
    Tobor said:

    Just going by the wattage or profile of the bulb itself isn't going to cut it. Car lights use reflectors, Fresnel lenses, lenticular lenses, and other optical mechanics to make the bulb brighter and the lighted area larger. The effect of the reflectors and lensing is part of the look. If you want absolute realism, you'll have to duplicate this as well as a "light texture." Most real headlights use reflective rings around the outside of the bulb to increase visibility, and light from the rings and other external surfaces looks different from light from the main part of the lamp.

    You are so right about this.

    Also note that Halogen or LED are not the same as incadecent when it comes to converting wattage to light output. 

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