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vray light directional parameter visible light issue

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  • vray light directional parameter visible light issue

    hi there,
    iv run into a problem using the directional parameter and lighting maintaining their visibility.
    ideally i would like them to remain visible even when the directional parameter is enabled. i want to do this to be able to use the glare pass from the light source

    below is images of disc lights with 0.0, 0.25, 0.5, and 0.75 directional parameters increased. is this a bug or expected behavior?
    cheers

    Click image for larger version

Name:	0.jpg
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ID:	885062Click image for larger version

Name:	25.jpg
Views:	1
Size:	39.9 KB
ID:	885063Click image for larger version

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Views:	1
Size:	40.1 KB
ID:	885064Click image for larger version

Name:	75.jpg
Views:	1
Size:	36.9 KB
ID:	885065

    edit - also with vrayenv fog off i get the same behaviour

  • #2
    The help pages say that this is expected behavior. I could suggest a workaround:

    Create duplicates of your lights and then make their "Directional" parameter value 0.0 and disable the checkbox "Affect Diffuse". Then in your original lights disable the checkboxes "Affect Specular" and "Affect Reflections". This way you will have visible reflections and speculars since the original lights won't produce them anymore if the Directional parameter is used.

    Let me know if this worked.
    Aleksandar Mitov
    www.renarvisuals.com
    office@renarvisuals.com

    3ds Max 2023.2.2 + Vray 7
    AMD Ryzen 9 9950X 16-core
    64GB DDR5
    GeForce RTX 3090 24GB + GPU Driver 565.90

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