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  • #76
    samuel_bubat wrote:

    Well for my part a physical correct sunlight look is worth much more
    than adjusting a sun by day and time because

    1. If morning, highnoon or evening. It´s just the color and intensity that changes (below the line). All of this can be adjusted by the color and intensity of sun and skylight . We are artists. Do we want a sunlight system dictating our lighting ?
    I want control
    And I think if you make yourself some presets for different daylight situations with and IESSun,high environment multipliers, and pre adjusted
    Log. Exposure vray is even easier to handle than Maxwell where you have
    to guess the position of the sun to get a specified lighting.

    2. My customers usually want a specific light situation. They don´t care
    if it´s physically correct or not. Sometimes the lighting is finished
    and they want it more yellowish, more white or a little change of the position etw. This is not easy to tweak if everything is physical correct. If my customer wants a specific lighting i can´t tell him that´s impossible because it would be physical incorrect. Can you ?

    3. As you pointed daylighting is quite complex so..
    How often do sunsets for example look similar. The light situation
    is different every day depending on pollution, haze layers, clouds,
    the alltitude you are , the region in the world and the temporary condition
    of your eyes.
    Does Maxwell take care of these factors ? I doubt

    I can imagine some situations where a sunlight system can be helpful.
    At least it should offer you any possibility to make fine adjustment
    in color brigthness and light position. (Wich makes it physical incorrect)
    But in my opinion this is a tool for scientist and not for artists !!
    Nice to play around with.. but useless for my kind productions.
    The sunlight look is all I (and probabely most other users) need. vray does a very good job with IES Lighting and Exposure !!
    I really think that point goes to Vray

    cheers
    Hi Samuel,

    It is perfectly possible to create unrealistic results with Maxwell. I know because I've done it! There are plenty of controls available for even the novice user to pervert the laws of physics.

    For a sunlight system, you can use the built-in sky dome and set it to whatever color you want or create your own and use an emitter material. For the sun, you can create a sphere of any size you want with an emitter material of any color you want.

    With the Physical sky, you control time, date, location, turbidity, ozone and water in the atmosphere. You can toggle sunlight on or off.

    With Tone Mapping, you can adjust contrast, film gamma and monitor gamma.

    With the Maxwell camera, you control DOF and light levels just as you would with a physical camera's fStop, lens length, and Shutter speed.

    For a software with so few knobs, the possibilities seem endless. And there are many features yet to be implemented, as Maxwell is still in Alpha. For me, right now it is something to play with and I feel I've already gotten my money's worth.
    Surreal Structures
    http://surrealstructures.com/blog

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    • #77
      For a software with so few knobs, the possibilities seem endless. And there are many features yet to be implemented, as Maxwell is still in Alpha. For me, right now it is something to play with and I feel I've already gotten my money's worth.
      Yeah, must be down only be pennies per render hour after only a couple scenes.
      Eric Boer
      Dev

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      • #78
        For a software with so few knobs, the possibilities seem endless. And there are many features yet to be implemented, as Maxwell is still in Alpha. For me, right now it is something to play with and I feel I've already gotten my money's worth.
        Yeah, must be down only be pennies per render hour after only a couple scenes.
        Zing!!!!
        ____________________________________

        "Sometimes life leaves a hundred dollar bill on your dresser, and you don't realize until later that it's because it fu**ed you."

        Comment


        • #79
          For a software with so few knobs, the possibilities seem endless. And there are many features yet to be implemented, as Maxwell is still in Alpha. For me, right now it is something to play with and I feel I've already gotten my money's worth.
          Yeah, must be down only be pennies per render hour after only a couple scenes.
          Zing!!!!
          It's all in what you think is fun...or funny.
          Surreal Structures
          http://surrealstructures.com/blog

          Comment


          • #80
            Im thinking its both...
            ____________________________________

            "Sometimes life leaves a hundred dollar bill on your dresser, and you don't realize until later that it's because it fu**ed you."

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            • #81
              Damn

              i just tested a small interior we did some days ago with maxwelll.

              i used physical correct plastic at the windows, and guess what, i got perfect caustix comming into the scene.


              Well there are some things real nice there.

              I wonder if those grayny slow slow slow slow slooooooooow immages that look like some sort of l map, could be used as a prepass, so we could get fast clean results if we want.

              He vlado , what do you think about those new algorithms ?

              some of them would fit very well to vray 1.6


              Ok


              Tom

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              • #82
                He vlado , what do you think about those new algorithms ?

                some of them would fit very well to vray 1.6
                They are not really new; bidirectional path tracing (which is the algorithm used by Maxwell) has been around for more than 10 years now - however, since it is somewhat slow, it has not been widely used so far. It is fairly easy to implement this in the standalone version of VRay and may be coming sometime after 1.5.

                Best regards,
                Vlado
                I only act like I know everything, Rogers.

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                • #83
                  Ah

                  a new test, well its real slow, so a nice vray mixed with this easy setup ?

                  hmm what about these old algorithms used as an easy setup prepass.

                  what does this mean with wavelength calculation compared to rgb ?

                  i would like to see also more physical accurate rendering options in vray too. and still that fast



                  look at those real sweet caustics incl. dispersion, and setuptime 1 minute.

                  Rendertime with 1200 pixel width, "700" !!! minutes,

                  Tom

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                  • #84
                    Tom, actually I noticed that maxwell can doa pritty decent render of such exterrior scene in about 20-30 min...obviously with still grain in there but pritty good. On another hand...put some heavy procedural shaders there, glossy reflections...and well thats going to be slow as hell...
                    Dmitry Vinnik
                    Silhouette Images Inc.
                    ShowReel:
                    https://www.youtube.com/watch?v=qxSJlvSwAhA
                    https://www.linkedin.com/in/dmitry-v...-identity-name

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                    • #85
                      The grass is always greener at the other side isn't it? Maxwell seems to be great for daylight scenes. On the other hand, I gave Bbulo's scene a try with the following settings, and found it to look quite convincing. No post processing other than converting to jpg

                      lightmap/QMC
                      whitepoint 6500K
                      skylight 3.5 (10000K)
                      Sunlight 7.0 (3000K)
                      colormapping linear 1.0/0.5

                      I wrote down color temperatures that I used to convert to RGB colors. A converter I found on this site:
                      http://flash.lakeheadu.ca/~rgirardi/kw_rgb.html

                      EDIT: link was incorrect


                      [/url]
                      You can contact StudioGijs for 3D visualization and 3D modeling related services and on-site training.

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                      • #86
                        Very Cool...thanks for the converter link
                        Bret

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                        • #87
                          i would like to see also more physical accurate rendering options in vray too. and still that fast
                          To a very large extent, VRay is physically accurate (it has physically accurate GI, materials and lights), and can compute the major components of the rendering equation. For all its physical accuracy, there are effects that Maxwell cannot compute - at all. The raytracing theory states that these affects cannot be computed with an exact (unbiased) raytracing algorithm, no matter what you do.

                          A simple example: a physical simulation of a light source with reflector (similar to IES lights). Almost all of the "direct" light in the scene comes from caustics. The image below is rendered in VRay. It is biased in the sense that caustics are blurred (although somewhat noisy); however the intensity is correct and they are visible in the mirror. If you render the same scene with Maxwell, the caustics will be perfectly accurate (still noisy though), but they will not appear in the mirror - at all. This may or may not be important in most scenes, but is a limitation that you cannot go around without "fakes" of one sort or another (for example, the IES lights in 3dsmax, which have the caustics pattern precomputed and approximated). This is not limited to mirrors only - the caustics will not be visible through glass either.



                          Here is the scene if anyone wants to try this in Maxwell:
                          http://www.vrayrender.com/stuff/impo...sible_vray.rar

                          Best regards,
                          Vlado
                          I only act like I know everything, Rogers.

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                          • #88
                            Are you sure Vlado? See this one:


                            You can contact StudioGijs for 3D visualization and 3D modeling related services and on-site training.

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                            • #89
                              what u go there is volumetric caustics...vray cant reproduce that yet
                              Dmitry Vinnik
                              Silhouette Images Inc.
                              ShowReel:
                              https://www.youtube.com/watch?v=qxSJlvSwAhA
                              https://www.linkedin.com/in/dmitry-v...-identity-name

                              Comment


                              • #90
                                I think I got confused by those images. I see it is not caustics that are reflected but light.
                                You can contact StudioGijs for 3D visualization and 3D modeling related services and on-site training.

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