But actually, you can still use it to attain even greater realism combined with GI. Wherever objects are close to each other, they occlude (block) light, and all corners become darker. This is just like calculating GI from the sky without any direct light.ĪO can achieve this same look faster, by simply calculating where objects or faces intersect each other, and making these corners darker.ĪO has dropped out of use nowadays because calculating GI has become fairly easy for modern day processors. Imagine a completely cloudy day, and you’ll notice that light seems to be coming from all over the sky equally. ![]() ![]() To put it simply, AO can simulate an ambient global lighting without actually calculating too many light paths. Back in the day, when calculating GI used to be highly CPU intensive, ambient occlusion was developed as its cheaper alternative. ![]() Ambient Occlusion, or AO for short, is an old rendering technique used as an approximation for true global illumination. Hey VRay users, today I’ll be discussing how you can use the Ambient Occlusion map VRayDirt to enhance your images.
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