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  • Difference layer mask

    I just want to know, how to create a Difference layer mask... maybe the correct term is Difference mask, i'm not sure...

  • #2
    Re: Difference layer mask

    Explain the question. I don't understand

    Comment


    • #3
      Re: Difference layer mask

      I kinda suck explaining things, but I guess it is just a Difference mask, like when you do a Luminosity mask or shadow mask...
      Last edited by Boneappetit; 04-09-2011, 03:11 PM.

      Comment


      • #4
        Re: Difference layer mask

        Hm, use the "Image"-"Calculations", enter the channels you want to compare and choose "Difference" as the blending mode?

        I'm not sure what you mean though, this is pretty much a guess ;-)

        Comment


        • #5
          Re: Difference layer mask

          Originally posted by Boneappetit View Post
          I kinda suck explaining things, but I guess it is just a Difference mask, like when you do a Luminosity mask or shadow mask...
          The blending mode difference will show different things with different layers.

          I guess you can always do a stamp of what you get when blending, then selecting the luminosity of the RGB channel and creating a luminosity mask of the difference blending mode results - after that you get rid of all the steps, you could create an action that does it for you

          Is that what u want?

          x

          Comment


          • #6
            Re: Difference layer mask

            Natalia and Jonas, thanx a lot guys, I can pick a bit of what you both wrote, I guess that this "Difference mode" is not something we use too often in Ps... Perhaps my question is not the correct one, I know how to do a Luminosity mask, I just wrote that there as a comparison. What I meant was: Is there a process to create a "Difference Mask" or if the Difference blending mode could be used on a mask? The purpose is to "darken" things or create ambient density.

            Natalia: Lo voy a escribir en Español para ver si me puedo explicar mejor... Solo quiero saber si el modo de fusion (Difference) puede usarse en una mascara, o si solo tiene el proposito de usarse como blending mode? Se que la pregunta es rara ya que no he visto a nadie utilizar un Difference Mask. El proposito es crear densidad en la foto, en el ambiente de la foto mas bien...

            Thanx again guys...

            Comment


            • #7
              Re: Difference layer mask

              No worries guys, i just found an old thread on the same theme, very tricky thou... I will also check both of your advises. Thanx

              http://www.retouchpro.com/forums/pho...ence-mask.html

              Comment


              • #8
                Re: Difference layer mask

                Originally posted by Godmother View Post
                The blending mode difference will show different things with different layers.

                I guess you can always do a stamp of what you get when blending, then selecting the luminosity of the RGB channel and creating a luminosity mask of the difference blending mode results - after that you get rid of all the steps, you could create an action that does it for you

                Is that what u want?

                x
                Gracias una vez mas Natalia. Esto funciono perfectamente. Me faltaba la parte del Luminosity mask, lo trate y me gusto el resultado. Para ser honesto no entendia el difference mode, y lo estaba tratando de usar como cualquier otra mascara. Tambien aprendi que lo puedo usar de otras maneras en conjunto con el blur para crear otros efectos, etc. Creo que entendiste mi pregunta, mejor que yo mismo, jejeje...

                Comment


                • #9
                  Re: Difference layer mask

                  Originally posted by Boneappetit View Post
                  Gracias una vez mas Natalia. Esto funciono perfectamente. Me faltaba la parte del Luminosity mask, lo trate y me gusto el resultado. Para ser honesto no entendia el difference mode, y lo estaba tratando de usar como cualquier otra mascara. Tambien aprendi que lo puedo usar de otras maneras en conjunto con el blur para crear otros efectos, etc. Creo que entendiste mi pregunta, mejor que yo mismo, jejeje...

                  Leyendo el otro thread no encontre la utilidad para hacer esto.
                  Vos si?

                  x

                  Comment


                  • #10
                    Re: Difference layer mask

                    Originally posted by Godmother View Post
                    Leyendo el otro thread no encontre la utilidad para hacer esto.
                    Vos si?

                    x
                    Tampoco yo lo encontre, decidi hacer lo que me habias recomendado y funciono... El difference mask como tal solo se puede hacer en After Effects. En Photoshop se usa el Blend Mode de otras formas, con diferentes exposiciones, o con el blur filter... Si deseas puedes ver este video, el cual encontre muy interesante... http://www.youtube.com/watch?v=zolWLMHUd94

                    Comment


                    • #11
                      Re: Difference layer mask

                      Originally posted by Boneappetit View Post
                      Tampoco yo lo encontre, decidi hacer lo que me habias recomendado y funciono... El difference mask como tal solo se puede hacer en After Effects. En Photoshop se usa el Blend Mode de otras formas, con diferentes exposiciones, o con el blur filter... Si deseas puedes ver este video, el cual encontre muy interesante... http://www.youtube.com/watch?v=zolWLMHUd94
                      Si, yo uso el difference para visualizar al hacer coincidir limites... no entiendo el punto de usar una mascara hecha con esa diferencia, lo que seria la "difference mask"

                      entendes?

                      x

                      Comment


                      • #12
                        Re: Difference layer mask

                        Originally posted by Godmother View Post
                        Si, yo uso el difference para visualizar al hacer coincidir limites... no entiendo el punto de usar una mascara hecha con esa diferencia, lo que seria la "difference mask"

                        entendes?

                        x
                        Solo en estos ultimos dias he venido a entender "un poco el Difference Blend Mode", pero no lo de la mascara, ya que hasta donde yo recuerdo, nunca lo habia usado en mis trabajos. Solo hice la pregunta porque en un tutrorial lei el paso del Difference Mask para crear densidad en la foto. Algo como el trabajo que hiciste de diferentes modelos parados en un solar oscuro, en donde el ambiente de la composicion se ve denso, (de paso, muy buen trabajo).

                        Disculpa por poner a trabajar tu mente inecesariamente, por tus consejos tambien me he dado cuenta que no hace sentido el hacer ese DM, pero tampoco entiendo porque Adobe After Effect tiene esa funcion, supongo que es porque el programa es para hacer animaciones y pienso que en ese caso si puede tener efecto.

                        Me gusta hacer cosas diferentes siempre y busco como hacerlas y aprender de los mejores. De todas formas, tu consejo funciona. Gracias por tu ayuda, eres genial...

                        Comment


                        • #13
                          Re: Difference layer mask

                          With due respect, can we have this in English so we all learn. Please.
                          @Boneappetit: If you get any thing out of this discussion, please feed us the goodies

                          Comment


                          • #14
                            Re: Difference layer mask

                            Originally posted by Aladdin View Post
                            With due respect, can we have this in English so we all learn. Please.
                            @Boneappetit: If you get any thing out of this discussion, please feed us the goodies
                            Hi Aladdin: My question was one out of not having knowledge on how to use the Difference Blend Mode, and I was trying to create a "difference mask" from it... Natalia and Jonas cleared that up for me... The difference blend mode, is used along with other features in Ps, like Luminosity Mask and Blur filter... besides, it is used with different exposures of the same shot. Basically i did this:
                            Quote:
                            The blending mode difference will show different things with different layers.

                            I guess you can always do a stamp of what you get when blending, then selecting the luminosity of the RGB channel and creating a luminosity mask of the difference blending mode results - after that you get rid of all the steps, you could create an action that does it for you. / ------

                            Actually it is a Luminosity mask with a Difference blend mode...

                            I came up with the question after I read this:
                            Quote:
                            Next make a difference mask like this…

                            http://www.robert-randall.com/MM/diff%20mask%201.jpg <---- Broken Link

                            Load it to make it active, and then ask for a layer curve. Now you can play with adding or detracting density from the midtone area to help create the illusion of more density. Usually this is a darkening move, but it can go the other way too. / ------

                            Perhaps Robert Randall meant something else, I don't know.
                            Difference mask is a feature that comes in Adobe After Effects not in Ps...
                            Natalia told me that she couldn't see the point on creating a mask from that difference. So that's about it...

                            I had to use Spanish with Natalia, so I could clearly communicate what I was trying to do...

                            Regards
                            Last edited by Boneappetit; 04-11-2011, 09:05 PM.

                            Comment


                            • #15
                              Re: Difference layer mask

                              Originally posted by Boneappetit View Post
                              Hi Aladdin: My question was one out of not having knowledge on how to use the Difference Blend Mode, and I was trying to create a "difference mask" from it... Natalia and Jonas cleared that up for me... The difference blend mode, is used along with other features in Ps, like Luminosity Mask and Blur filter... besides, it is used with different exposures of the same shot. Basically i did this:
                              Quote:
                              The blending mode difference will show different things with different layers.

                              I guess you can always do a stamp of what you get when blending, then selecting the luminosity of the RGB channel and creating a luminosity mask of the difference blending mode results - after that you get rid of all the steps, you could create an action that does it for you. / ------

                              Actually it is a Luminosity mask with a Difference blend mode...

                              I came up with the question after I read this:
                              Quote:
                              Next make a difference mask like this…

                              http://www.robert-randall.com/MM/diff%20mask%201.jpg <---- Broken Link

                              Load it to make it active, and then ask for a layer curve. Now you can play with adding or detracting density from the midtone area to help create the illusion of more density. Usually this is a darkening move, but it can go the other way too. / ------

                              Perhaps Robert Randall meant something else, I don't know.
                              Difference mask is a feature that comes in Adobe After Effects not in Ps...
                              Natalia told me that a "difference mask" makes no sense, and it really doesn't. So that's about it...

                              I had to use Spanish with Natalia, so I could clearly communicate what I was trying to do...

                              Regards
                              Robert Randall is a old master of photography who knows more about the subject then many peeps combined he was explaining exactly what his mask did in terms of the image and didn't cover its creation but if asked he would share maybe still would if asked. But I caveat he can be harsh but to be honest his work is pretty awesome and his knowledge of photography even moreso....

                              http://www.robert-randall.com/content/

                              Oh and I be very careful before I state something like his statement doesn't make sense be more like I don't understand how you made a or achieved a difference mask or you may get your ass handed to u lol...

                              Comment

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