04 Oct Lighting tutorial – Image-based V-Ray’s Adaptive Dome Light
Lighting tutorial – Image-based lighting with V-Ray’s Adaptive Dome Light
This lighting tutorial describes about the Adaptive Dome Lighting feature which is now available in V-ray , you can render smarter than ever before.
A dome light is a type of spherical or hemispherical area light that shines inward and is often combined with panoramic HDR for image-based lighting. However the sampling of dome lights can be inefficient due to other light entering interior spaces, eg from a window in the scene, meaning that only a small amount of the dome light will contribute to the image.
Adaptive Dome Lights calculate which parts of the dome light are likely to affect the scene using Light Cache data, and here Chris gives us four steps to improving your lighting.
01. Light an interior with IBL
Currently, when you’re lighting an interior scene using image-based lighting, you might add Skylight Portals near openings like doors, windows or skylights to help direct more light samples. Unfortunately, this is a manual process that takes time, but worse, it’s also not that accurate.
02. Build a smarter dome light
To avoid this problem, we built a smarter dome light based on a similar concept to our Adaptive Lights algorithm. Using the Light Cache calculation phase to learn which parts of the dome will most likely affect the scene, the new Adaptive Dome Light can better predict its sampling.
03. No more skylight portals
With the Adaptive Dome Light, Skylight Portals are no longer needed for the lighting process. It automatically figures out which portions of the environment to sample and which ones to ignore, making it so much easier to set up and much more efficient and accurate to render.
04. Seven times faster IBL
Many factors can affect the overall speed gains that this feature can give you. Our early tests have shown speed increases from 10% up to 700%, depending on the scene. V-Ray 3.x for 3ds Max customers can register for the V-Ray Next Beta and try out the Adaptive Dome Light right now.
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