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Vertex Colors

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13 comments

  • pixel-ninja

    Can vertex colors be used to drive transparency levels for hair cards? Inner most geometry = less transparent?

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  • James

    We support the Alpha channel in vertex colors, so yes you could probably use it for hair.

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  • xraysatellites

    Can I change vertex color setting per object?

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  • James

    Not at the moment. Can you share more about your use case?

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  • xraysatellites

    Thank you reply :)
    In my case, I put my textured character (it has vertex color too for Memo)  to the simple pedestal it colored by the vertex coloer, no UV.

    then, I use vertex color setting, My textured character bleed the memo vertex color on texture.

    So, I just want to turn off that character only.

     

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  • James

    Interesting, thanks! It's probably not something we're going to implement on the short term.

    However, I believe we use the "multiply" blending mode to mix vertex colors with diffuse/albedo/base color, so if you make the vertex colors white everywhere that you will have a texture, it should not affect the final color.

    By the way, I notice you're using quite a lot of post-processing filters on your models. These filters are very "expensive" in terms of model performance, especially Bloom, SSAO, and SSR. In this model, for example, the Bloom and SSAO aren't really doing much for you, so I would recommend disabling them: https://sketchfab.com/3d-models/celen-beat-covid-19-fea6d1aa9aa94457826721be6db58008

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  • xraysatellites

    thank you for reply and advice.
    I turned off those. Tuning those effects are super fun, so I might did too much. XD

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  • James

    Haha yes they are. I think we all tend to be a bit "trigger happy" with the filters :)

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  • emiliogil88

    Would it be possible to export the vertex color to a texture file?
    I am trying to use ZapWorks studio, but cant make to import the model with the color

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  • James

    Hi there,

    I don't have much experience with it, but I think you could use software like Blender or MeshLab to UV unwrap a model and "bake" vertex colors into a texture.

     

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  • Angelina_Artelia

    It looks like this option is lost, was it replaced or transferred? 

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  • James

    Hi there,

    If you do not see the option, it means the model does not have vertex colors.

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  • edgarej

    Hello

    Summary of my question: what is the best way for me to show my blend project/model with correct vertex colors intact?

    I have a model on my profile page with vertex colors showing (https://skfb.ly/ovIAV). This model is an fbx model that I exported with Blender 3.2. At some point between blender 3.2 and  3.3.0, the fbx exporter was changed. Now when I try to upload an fbx file I exported from Blender, no vertex colors would show. Somebody suggested I try the gltf file, and that model works, but the vertex colors are showing too dark. I have a few draft files on my profile right now that maybe you could take a look at?

    So to paraphrase my question, what is the best method for uploading a file with vertex colors intact and with the right brightness? I have tried uploading a blend file before but a blend file always errors out on me. OBJ files are out cause apparently vertex color support for it is dicey. That leaves me with fbx and gltf, both of which doesn't compare to the old fbx exporter of blender 3.2.

    Any help you could give me would be great, thanks.

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