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Emission color values with Filmic

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Viewing 14 posts - 1 through 14 (of 14 total)
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  • 2020-11-20 at 5:06 pm #35579
    Branden Coker
    Customer

    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

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    2020-11-21 at 1:31 pm #35596
    Yuri Kovelenov
    Staff

    Hi Branden,

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

    Chief 3D Verger | LinkedIn | Twitter

    2020-11-23 at 4:26 pm #35782
    Branden Coker
    Customer

    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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    2020-11-24 at 8:57 am #35809
    Yuri Kovelenov
    Staff

    may be this can help: https://blender.stackexchange.com/questions/92177/how-to-get-accurate-colors-with-filmic-blender

    Chief 3D Verger | LinkedIn | Twitter

    2020-11-24 at 1:54 pm #35816
    Branden Coker
    Customer

    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:

    2020-11-24 at 4:31 pm #35818
    Mikhail Luzyanin
    Staff

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

    Co-founder and lead graphics specialist at Soft8Soft.

    2020-11-24 at 4:39 pm #35820
    Branden Coker
    Customer

    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.

    Mikhail Luzyanin wrote:

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

    2020-11-25 at 8:53 am #35852
    Ivan Lyubovnikov
    Staff

    Hi Branden,

    Branden Coker wrote:

    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:

    
var led = app.scene.getObjectByName('led');
led.material.toneMapped = false;

    Co-founder and lead developer at Soft8Soft.

    2020-11-30 at 6:53 pm #36104
    Branden Coker
    Customer

    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?

    2020-12-01 at 8:42 am #36134
    Alexander Kovelenov
    Staff

    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.

    Soft8Soft Tech Chief
    X | FB | LinkedIn

    2020-12-04 at 4:32 pm #36202
    Branden Coker
    Customer

    Thanks Alexander! That gave me exactly what I needed. Looks great now.

    Cheers

    2020-12-05 at 5:26 pm #36225
    visualizer
    Customer

    Hi
    Branden,

    can you share the result you achieved ?
    I m also finding filmic gives more expected natural colour than other modes however not sure how it is effectively handled by V3D.
    Some time ago I also tried to see if emission by using filmic can produce better results.

    Regards

    2020-12-07 at 8:36 pm #36251
    Branden Coker
    Customer

    Sure, you can see my app (still a WIP) here.

    As discussed above, the model is using the Filmic view transform, while the orange dots are using the standard transform. This gave me the look I wanted on the reflections in the metal while giving me a specific color on the bullets. This is the color of our brand, so it was important to hit it as accurately as possible.

    visualizer wrote:

    Hi Branden,
    can you share the result you achieved ? I m also finding filmic gives more expected natural colour than other modes however not sure how it is effectively handled by V3D. Some time ago I also tried to see if emission by using filmic can produce better results.
    Regards

    2021-07-31 at 5:59 pm #43350
    jdhutchinson
    Customer

    Hi,

    WOuld people recommend using Filmic for V3D apps?

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