hdri in interior scenes?
Upirium
Posts: 711
in The Commons
Does it work at all? Like if I use an HDRI lighting and then put up an interior will it still work inside or do I have to use actual lights?
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Comments
It can work. But I'd remove the ceiling and walls which aren't visible.
It'll work, but obviously the light will only come through the windows.
I'd recommend adding some light portal spotlights near the windows and some dim point lights around the room to give your scene some diffuse ambient light, otherwise it'll be a noisy mess.
Iray no longer uses Light protals, as I recall (or at least, they are deprecated).
I use IRay Section panes to allow the HDRI light in behind and above the camera field of view. There are some cameras avaible which are configured with a set of Section Panes but it is easy enough to do it yourself.
They're still in the spotlight settings, and the most recent Iray documentation (dated March 27th) makes no mention of them being deprecated.
Paper Tiger includes an "HDRI X-Ray Camera" in their Vivid HDRI Lights set on Renderosity. This sets up something round the camera to let in light from the directions not in the field of view, I think they are section panes but I'm not sure. I don't know if this is included in any of the stuff Paper Tiger stuff sold at Daz.
In 3Delight you can just set the walls to not cast shadows. This is an example of how Iray's obsession with realism all the time can be very annoying.
The iray interior camera is a good (and free) way to use hdri to light an indoor scene. Its maps the HDRI on several planes around the camera in such a way that the plane are not visible by the cam.
https://www.deviantart.com/heroineadventures/art/Iray-Interior-Camera-V1-4-758604718
You can also look at assets that set up section planes to mask part of the scene to let hdri light enter
https://www.daz3d.com/iray-stand-kit
https://www.daz3d.com/interior-light-pro-for-filament-and-iray
I hide the walls (and sometimes ceiling) that are behind the camera. HDRI can work great for some interior scenes. This scene's main light was from HDRI Haven (obviously with additional character spots, etc) -
This one was lit with one from Skies of Gaia 2 (with additional character spots, etc) -
In each case, I just hid the walls behind the camera. Oftentimes, I can get better lighting results that way over relying on out of the box setups that come with sets, which can be very heavy. It also gives me the opportunity to make the scene more customized.
I use this freebie a lot. The trick is to use it with HDRI that are of interiors similar to your actual scene. Then, by rotating the HDRI you can easily adjust the lighting. It works great. I also made versions with other focal lengths, tho' its kind of a pain to adjust the 4 iray planes to match the different FOV, and you can only have one in the scene at a given time. If someone good at scripting could create a zoomable IIC that automatically adjusts the planes, it would be terrific.
Not sure that what you describe is how that camera works. It looks to me to be set up the same way as the Paper Tiger X-Ray camera (and others) using IRay section panes attached to the camera. You seem to be suggesting that it has panels with HDRi somehow projected on to them?