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Emission color values with Filmic

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  • #35579
    Branden CokerBranden Coker
    Licensee

    I’m using the Filmic view transform for my application and getting the results I expect. However, when adding emission shaders for a UI element, the color is not what I expect. I know this has to do with the black magic of color spaces and color management and gamma, but I still don’t know how to use Filmic and have a specified color appear in my application. Anyone else doing something like this?

    My HEX value and desired color:
    hex

    Blender nodes:
    nodes

    Standard view transform (desired color):
    standard

    Filmic view transform (not desired):
    filmic

    • This topic was modified 1 week, 4 days ago by Branden CokerBranden Coker. Reason: added images
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    #35596
    Yuri KovelenovYuri Kovelenov
    Developer

    Hi Branden,

    We were not able to reproduce this on our side. Can you attach a sample .blend?

    3D Verger, the CEO
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    #35782
    Branden CokerBranden Coker
    Licensee

    Sure thing Yuri. Attaching a scene here with the color I’m hoping to achieve. Just to be clear, this happens in Blender and is reproduced accurately in Verge. I know this isn’t a Verge issue. It’s more of a lack of understanding on my part. There must be a way to specify an precise color while using the Filmic view transform.

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    #35809
    Yuri KovelenovYuri Kovelenov
    Developer
    #35816
    Branden CokerBranden Coker
    Licensee

    Ah yes. I’ve read through it before. I’ll have to read it again. My initial impression was simply, “it can’t be done.” I’ve managed to tweak my colors to the point were they are close, but they still aren’t exact. Clearly I have more to learn on this subject. :mail:

    #35818

    Why you do you use Filmic if it cause such problems?

    Co-founder and lead graphics specialist at Soft8Soft.

    #35820
    Branden CokerBranden Coker
    Licensee

    Typically I don’t use it. In this app I’m using it because the lighting on my model looks more natural with Filmic. Initially I thought I could use Filmic in my primary scene and then I could append a separate scene with a standard view transform for the UI elements. Unfortunately, it seems that the first scene loaded dictates the view transform and subsequent scenes are simply forced into the existing view transform.

    Why you do you use Filmic if it cause such problems?

    #35852

    Hi Branden,

    There must be a way to specify an precise color while using the Filmic view transform.

    You can disable Filmic per material via js API. There’s a toneMapped material property, which needs to be set to “false”:

    This is how it can be done for the “orange bullet.blend” example:

    Co-founder and lead developer at Soft8Soft.

    #36104
    Branden CokerBranden Coker
    Licensee

    Thank you Ivan. I was able to use JS to disable tonemapping for the orange material. I did have a problem when attempting to do this for an object that has more than one material assigned. Is there a way to specify the material on an object, or should I limit my objects to a single material for this purpose?

    #36134

    Hi Branden,
    Multi-material object is basically an empty (no geometry) object with 2 or more mesh children (each has exactly one material). Simply get your child by number and assign its material to anything you want.

    Co-founder and CTO at Soft8Soft
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