6 Replies Latest reply: Dec 18, 2013 8:32 AM by Fuzzy Barsik RSS

    Premier Pro Blend mode issue

    4500 Times Community Member

      Hi.

       

      I have previously used Screen blend mode to add a set of images on top of another set.  The first set (rendered from 3DS Max) were the main image for my animation and the "superimposed" set were rendered from 3DS Max as VRay atmosphere render elements.  Both images were rendered to a black background in Max.  When I added the "superimposed" set I simply chose Screen blend mode for them and they were added, fine.

       

      I am now trying to achieve something similar.  This time the first set of images are rendered to a white background.  The second set are rendered to VRay material select render elements (aI have tried both white and black background - same result).  When I add the second set into a separate video slot on the timeline and use Screen blend mode, the result is a faded/patially transparent image overlayed where there are objects in the "background" image.  Where there is a white background nothing of the top layer is visible.

       

      I can see that this is somehow mixing the colours/light and producing pure white outside of the scene objects.

       

      Q.  How do I achieve the required mix of the two sets of images?

       

      Many thanks,

       

      Terry

        • 1. Re: Premier Pro Blend mode issue
          4500 Times Community Member

          Hi.

           

          Does anyone please have any ideas on this as I am getting near deadline and still haven't found a method.

           

          Thanks,

           

          Terry

          • 2. Re: Premier Pro Blend mode issue
            Mark Mapes Employee Hosts

            What are you trying to accomplish, specifically with regard to the white background on the first set of images? Do you want the white to be preserved in some way or eliminated? If you want it eliminated, then a keyer effect might be the answer.

            A screenshot might help, including the Program Monitor and the Effect Controls Panel with the track item on the top layer selected.

            • 3. Re: Premier Pro Blend mode issue
              4500 Times Community Member

              Hi Mark.

               

              What I have is an overlay image (or set of images) that has some scaffold on it.  It has been rendered off from 3DS Max using a VRay material select render element so only the scaffold is visible but the remaining objects in the scene obscure the scaffold where applicable.

               

              The scene image which scaffold will sit on top of has objects in around 3/4 of the scene with the white background showing to the side of these objects.  The scaffold in the overlay images covers some of the scene objects and also some of the white background.

               

              When I use a "Screen" Blend mode for the overlay images I get a pale partially transparent image of the scaffold where it sits above the scene objects and nothing at all where it sits above the white background.

               

              The top image is the first frame showing scene objects.  The second image is the scaffold overlay.  The third image shows what happens when I use "Screen" Blend mode on the scaffold overlay in Premiere Pro.  The scene object images are on Video 1 and the scaffold images are in Video 2.

               

              Image-overlay-screen mode.jpg

               

              The result I desire is the top image (scene objects) with the scaffold added on top.

               

              Hope this helps.

               

               

              Thanks,

               

              Terry

              • 4. Re: Premier Pro Blend mode issue
                Fuzzy Barsik Community Member

                1. Check this help section on how blending modes work.

                2. You can either apply Luma Key onto your 'scaffold' track and set Threshold and Cutoff to e.g. 15% or experiment with procedural mattes.

                3. You really want to re-render your scaffold with aplha instead of black background.

                • 5. Re: Premier Pro Blend mode issue
                  4500 Times Community Member

                  Thanks for that.

                   

                  I am fairly new to this so forgive my ignorace.

                   

                  If I render to say a TGA with alpha channel, which mode do I then use to blend the scene frames and the scaffold TGA's?

                   

                  I did try rendering to TGA the other day but did not get the desired result.

                   

                  Thanks,

                   

                  Terry

                  • 6. Re: Premier Pro Blend mode issue
                    Fuzzy Barsik Community Member

                    If you render your scaffold with alpha, black background turns into transparent area, hence you won't need to utilise blending modes, you simply overlay the scaffold and track below is seen through transparent area.

                     

                    If you have some issues with rendering with alpha, that's another story. As Rick Gerard asked you, upload a sample file and post a screenshot with your rendering settings.