This rendered for 1 hour and is still somewhat noisy. Again this is just an example you will, generally, need additional lights. Your mileage will definitely vary on this one.įor reference here is a render made with just an HDRI, portals and minor lighting provided by objects with emission (like the bedside lamp). It should be noted that these light portals can be very situational and, according to Nvidia, do not help if using the built in ‘Sun/Sky’ system. This is very important to make sure your lights and your HDRI are take into account and (according to the Daz 3D Documentation) ‘Caustic Sampler’ must be enabled for portals to work correctly. You will, in most cases, need other lights inside your room still and also make sure you have your rendering settings set to ‘Scene & Dome’ and enable the ‘Caustic Sampler’ in the Optimization section of the Render Settings. I seem to have more success placing them just inside the window. I’m unsure which side of the window the portal should be placed on, or if it matters at all.
DAZ STUDIO IRAY RENDER SETTINGS WINDOWS
When placed in front of small entry ways such as windows these will help ‘guide’ the light paths from the iRay renderer into the window. If you create a point light and set its ‘Light Geometry’ to rectangular a new option called ‘Light Portal’ will appear under its light properties. The darker interior lighting would cause the window to appear very bright and ‘blown-out’ to a camera. If it is in view of the camera then it will appear white, but in most cases this would be correct. Turn your window into an emissive surface.
This is a pretty overused technique but still very helpful. This provides some extra light sources already inside the room, and should still keep lighting within what you might consider ‘realistic’ levels.
The only light coming in will be through any open areas such as windows.Ī simple solution is to place some point lights with a low emission in the room to provide some extra light. This is especially a problem if you are lighting your scene with only an HDRI. Lack of LightingĪ simple issue can be that there is not enough light. There are however some simple tips that can be used to reduce render times quite significantly. One of the trickiest parts of any interior based scene is the fact that a path trace renderer such as iRay will generally take quite a while to converge to any acceptable level.
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