Rectangle light render issue

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.

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...

If you have an LED light strip, then simply use a rectangle light to emit light:

With Enscape, you model the world (mostly) as it is and it will produce reasonable results.

hello there,

I managed to increase the value of the emissive but still facing the same problem, when i render my path i don't see desired emission of the light on the wall and you have suggested to use the rectangular light but my model looks oval shaped, how can i curve the lights be it rectangle,line,disk

Thanks

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.

Thanks Sean,

Yes its supposed glow on the sides, and yes i have increased emissive power to full, still barely glows, and i will try using few line as you mentioned if that helps me out.

Thanks

Same issue here, I tried to find the problem, I may have some clues after some tests, yes, there is a problem with rectangular and line light as far as i tested... it happens when you create the first light, then you duplicate in sketchup from the first light to another light rather then creating a new light... which every sketchup user does, we are trained to work faster by duplicating and moving components...... problem is, even if you make the new component (the light) "unique" so that you think you can change its properties without altering the first one's properties, at that moment, if you diminish the length of the new one, you notice in the 3d preview, the two lights adopt the latter option, and from there on, its like a bug, whatever you do, the smaller size will stay, whatever you do.......... my advice, always make new light so that you can avoid this bug.

Same issue here!!

If I put the Rect light on and mark the light up, the beam is reduced. If I mark the slanted light, the beam is complete.

thanks for this info.... anything will help us avoid the bug till they get it fixed