Rectangle light render issue

  • Hello,


    I got an issue with lights rendering. See the capture video below:

    https://www.dropbox.com/s/pzwm…nCaptureProject1.mkv?dl=0


    Enscape is running, when I'm moving closely to the light the light diffusion seems to work well.

    As soon as I'm moving back the camera the light effect disappear.

    Then I'm capturing a shot, and just a second before it runs there is like a screenshot preview of the rendering that I would like, but at the end it does not look like how I expected.


    Final render:


    Render I expect:



    Hope it makes sens !

    Thanks for your help !

  • Hello Ren ,


    you may want to use an actual light ("Enscape Objects" -> Line [Light]) and place it behind the bench / sofa. Although emissive surfaces contribute to the global illumination, the results may vary of the surface is not visible. You may also want to increase the emissive power of the material, that should make it contribute more in the screenshot.

  • Hey Sean,


    Thanks for your feedback, but I don't think light settings are the issue there.

    As shown on the video and my screenshot, the render preview shown just before capture process is exactly what I'm looking for. The question is why

    the final capture is not as per the render preview ?


    Thanks

  • So here what is happening, Enscape has a global illumination that works in real time. The reason why it works is because it reuses lighting samples from one frame to the next. This can lead so some light bleading. For example if you walk up and back as in the video, then look fully away and you will see the lighting being reset.


    For the screenshot Enscape resets the global illumination as to not have erroneous samples from the real time rendering. Part of the reason why the screen shot takes this long is because Enscape recreates high quality global illumination. The conditions at the beginning of the screenshot is the result from the reset and is mostly junk data, you will occasionally see black sections and has no meaning for the resulting image.


    To achieve the desired result, you need to increase either the emission of the surface or add a line light.

  • welll... i was about to make a thread for some area lights too... this LED stripe kind of light situation is very common nowadays and its not easy to set up in enscape... the dedicated line light and area light tools are useless in my opinion, and the emissive materials work well for tvs or fires, but for light with proper homogenous lightning its not good...


    so ?! how to set up uproper?


    use multiple sphere, spot, area linelights? all gives problems for larger scenes...

    win 10 | 2080ti | dual xeon w2687w | 128gig ram | asus mainboard | ssd | htc vive | asus proart 4k monitor

    modelling stuff with sketchup, drawing stuff with vectorworks, rendering with cinema4d r20 + corona render & now of course, enscape :)

    but best of all > experiencing stuff in VR with enscape !!

  • Is the light supposed to come out of the side or the front?


    The light emitter does not have to match perfectly the shape, for plausible results. If it is supposed to come out the side, you can use a few line lights along the edge. It's not a perfect solution, but should bring you close the the desired result.


    Also have you tried increasing the emissive power of the material? In some instance that is sufficient.