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Why does my color change when adding emissive layer?

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  • E Offline
    eddiemoney
    last edited by 2 Jul 2015, 16:02

    So I made a model with a glowing color in it (blue.) Settings looked perfect once I rendered.

    I need to change the blue to purple.

    I adjusted the blue color that was working previously to a purple and all of a sudden the emissive layer became WHITE and will not change to purple unless I bring all values to 1, which means no emissive light-glow happening.

    When I start from scratch and add purple, then add the emissive layer to the purple, and then increase values, it turns bright pink... unless I keep the values so low there is no glow happening. I need it to glow purple, not pink. What the hell is going on here?

    I just want the same effect I had happening with the blue lights to happen with a purple light.

    Someone please assist.

    Thanks!

    Ed


    SCR1..jpg


    SCR2...jpg


    SCR3...jpg

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    • A Offline
      andybot
      last edited by 2 Jul 2015, 16:19

      you could try lowering your other lighting values (and adjusting the scene exposure) to where a 1x multiplier shows up for your emmmissive material. 40x seems like a really high amount for an emmissive material value.
      I find emmissive works best with a value around 1.0 or lower.

      http://charlottesvillearchitecturalrendering.com/

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      • E Offline
        eddiemoney
        last edited by 2 Jul 2015, 16:56

        Mmmmm I see...
        Can you give a little more guidance on how to accomplish adjusting scene exposure? I am currently using 4 lights to illuminate the whole scene, no sun or bg color... each light is at about 20 intensity. Thanks!

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        • E Offline
          eddiemoney
          last edited by 2 Jul 2015, 17:00

          heres a shot of my lights set up ๐Ÿ˜„


          SCR4...jpg

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          • A Offline
            andybot
            last edited by 2 Jul 2015, 17:16

            oh - I'd change the decay and falloff to Inverse Square & Smooth Cubic, respectively. Is physical camera turned on or off?

            http://charlottesvillearchitecturalrendering.com/

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            • E Offline
              eddiemoney
              last edited by 2 Jul 2015, 17:28

              Physical camera on


              SCR45..jpg

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              • E Offline
                eddiemoney
                last edited by 2 Jul 2015, 18:48

                Those changes produce basically black results...(same intensity - 20)

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                • A Offline
                  andybot
                  last edited by 2 Jul 2015, 19:02

                  Yes, yes they would. The physical camera settings are the default for a brightly lit outdoor scene. Try changing the camera settings to shutter speed 30, f number 4.0, and film speed 400. That's just a quick guess, but you can adjust those values as needed to get the right amount of exposure in the scene.

                  http://charlottesvillearchitecturalrendering.com/

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                  • E Offline
                    eddiemoney
                    last edited by 2 Jul 2015, 19:07

                    Here are the results with those last suggested settings.


                    12.3.jpg

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                    • E Offline
                      eddiemoney
                      last edited by 2 Jul 2015, 19:12

                      I'll keep adjusting until i am doing this the right way with the right settings but in the interim, for this current project which i am trying to finish within the hour ๐Ÿ˜„ - why does this happen (attached)?

                      The slightest change in color or multiplier (value of 1) turns the color white. I know I have had previous projects where the value was 30 or even 100 and had a perfect glow to it and maintained its color, didnt change to pink or white... something must be different that I am not noticing.


                      11..jpg


                      13..jpg


                      12..jpg

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                      • E Offline
                        eddiemoney
                        last edited by 2 Jul 2015, 19:34

                        Look... it reflects the correct color and intensity but no matter what i try, it emits the bright white ๐Ÿ˜


                        33.jpg

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                        • A Offline
                          andybot
                          last edited by 2 Jul 2015, 19:46

                          sorry - I don't usually use scalar for my units. I typically use luminous power. For the camera settings I gave you, you can use 10000 for the spotlight power. Then for a purple emmissive material, you can use an intensity of about 0.5 The brighter the intensity, the more pink it will look. May need to set the shutter slower, like 15

                          Also, try adding a radius of 3.0 to your spotlight for softer shadows, and increase the subdivs for the spotlights to something like 16 or 24.

                          Hope that helps.

                          http://charlottesvillearchitecturalrendering.com/

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                          • E Offline
                            eddiemoney
                            last edited by 2 Jul 2015, 19:50

                            thanks! will try and report back

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                            • A Offline
                              andybot
                              last edited by 2 Jul 2015, 20:01

                              I took a stab at some settings since I am working on a similar sort of setup (spotlights on an object) and looked at what values would work for the lighting and material. Here is what I've got.


                              barrel-stand5_emmi.png


                              2015-07-02_160246.png

                              http://charlottesvillearchitecturalrendering.com/

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                              • E Offline
                                eddiemoney
                                last edited by 2 Jul 2015, 20:04

                                closer but still very white.

                                let me check out your settings.


                                22...jpg


                                1..jpg

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                                • E Offline
                                  eddiemoney
                                  last edited by 2 Jul 2015, 20:18

                                  with your settings


                                  33..jpg

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                                  • E Offline
                                    eddiemoney
                                    last edited by 2 Jul 2015, 20:23

                                    i got frustrated and slammed the shutter speed up to 200 just to see what would happen and it actually came closer to my desired results. The problems now are there is less glow and I am guessing I will need a ton of spot lights to illuminate the scene now since it appears so dim. SO weird.


                                    34..jpg

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                                    • A Offline
                                      andybot
                                      last edited by 2 Jul 2015, 20:37

                                      I think you just need to keep reducing the multiplier on the emmissive layer. It also helps to change the emmissive color to lower saturation and make it a darker value.

                                      http://charlottesvillearchitecturalrendering.com/

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