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apply a logo on layer (carrara 6)

ralph_lgralph_lg Posts: 24
in Carrara Discussion

Hi,

When I add a "logo.png" with alpha on an overlapping (rectangular) layer, the transparency zones looks like "holes" on the object.
... The goal is to add logo with transparency itself (for nice soft borders) but keeping objet property behind transparency zones.
Is it possible ?

Thanks for help !

Ralph
 

Comments

  • DartanbeckDartanbeck Posts: 21,543

    Okay, try this:

    I'm assuming that both the original texture and the logo look properly as far as how they lay on the surface of the object, and that all we need to do is to:

    - Keep the underlying materials as they are and

    - Apply the Logo png directly over the top of the underlying materials

    ==========================================================

    I've never tried doing the process that you've been trying, but I recall seeing that as a posibility, and I'm not sure why it's not working properly for you, so here's a method that might get it working, but I've never tried this either... just thinking out loud:

    Make a duplicate copy of the original material shader that represent the proper underlying texture, so that we have a back-up in case we need to copy/paste the whole shader and just to be safe.

    Now go into that main shader and, at the very top level, change it from "Multi Channel" to "Layer List" (under Advanced, I think?)

    This should place the original shader as one of the shaders in an otherwise empty list. Since this one already behaves as we need it to, minimize it by clicking on the "Shader" channel's hierarchy triangle thingy.

    Click the + sign to add a new layer, and set that to Multichannel, and set the color channel to use your logo.png and set the rest to an appropriate setting - "None" for functions not being used to save the render engine looking at it.

    Since we didn't use an Opacity Mask for either shader, this should work. If it still has the "Holes" effect try switching the order of the layers. An easy method for that is to copy the Logo shader to the top layer and use the backup shader to copy over to the second one.

  • evilproducerevilproducer Posts: 9,050
    ralph_lg said:

    Hi,

    When I add a "logo.png" with alpha on an overlapping (rectangular) layer, the transparency zones looks like "holes" on the object.
    ... The goal is to add logo with transparency itself (for nice soft borders) but keeping objet property behind transparency zones.
    Is it possible ?

    Thanks for help !

    Ralph
     

    So, are you using a mask for the alpha or just the transparency in the .png file?

    I've done it before, but I'll be darned if I'm having any luck at the moment.

  • ralph_lgralph_lg Posts: 24

    Thanks for answers !

    I don't know if I follow recommendations correctly, but it's not seems to be the solution frown

    Yes, before mix many shaders, I want to know if this easy way works : putting image and use its transparency zone for itself but not for the object material (... it can be useful to get holes with image transparency on an object, but it's not my goal yet).

    By default, shader is "multicanal" (in french) but if I add a layer (in this case a rectangular zone), automaticly Carrara set a new "multicouches" tree. Then we can set a "multicanal" for this zone, but I still unable to avoid the hole (see picture sample).

    Thanks again !

     

  • 3DAGE3DAGE Posts: 3,311

    When you create a shape layer on an object. Carrara should create a new layer shader and an Opacity layer.

    Using your PNG (with an alpha channel) will initially show a hole,. because the default texture map setting is using "Colour and Alpha". ..change that setting to "Colour Only", then add the same PNG with alpha, to the Opacity layer, and change it to use "Alpha Only"

    Layers list.jpg
    1217 x 627 - 119K
  • ralph_lgralph_lg Posts: 24

    THANKS 3DAGE !
    I presume the Opacity layer is here to do this job !

    ... and thanks Dartanbeck and evilproducer for attention laugh

  • evilproducerevilproducer Posts: 9,050
    It's been a long time since I've done it, so I couldn't remember all of it. Thanks for the help Andy! I'll have to try and remember the tip.
  • DartanbeckDartanbeck Posts: 21,543

    3dage, you're the Best! I love you, man! :)

  • 3DAGE3DAGE Posts: 3,311

    Thanks Guy's :)

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