Portals

Hello there,

I understand what portals are supposed to do, but I’ve done several tests and alternate between two image slots (portals on/off). I can’t seem to spot a difference. In fact, with portals activated, the render took slightly longer than the same scene with them off.

The scene is a simple interior with environment lighting. But perhaps that’s the problem? Is it more noticeable with more complicated scenes containing textures and varying surfaces? I can’t seem to find anything out there really explaining it. Wondering what others have experienced.

Thanks! :slight_smile:

Hi. You read this recent thread to see if you can draw any conclusions:
https://blenderartists.org/t/blender-2-8-cycles-rendering-with-portals/1158309

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If you can share your case scenario (.blend file, screenshots), we could help better.

It shouldn’t matter I suppose. Only the area of the opening matters.

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