Credit: MrtheplagueĪdding an ambient occlusion factor to a scene can greatly improve the visual fidelity, and so a lot of thought has gone into methods for calculating and approximating ambient occlusion efficiently. The basis for this idea is a heuristic or empirical argument, and can be computed by finding the amount of surface area on a hemisphere which is visible from a given point: Ambient occlusion illustrated. The basic idea is to approximate the amount of ambient light that is propagated through the scene towards a point from distant reflections. Ambient OcclusionĪmbient occlusion is a simple and effective technique for improving the quality of lighting in virtual environments. So I decided to write a quick blog post on it, as well as discuss a few of the small technical issues that come up when you implement it within a system that uses greedy meshing. To those who are in-the-know on voxel engine development, this stuff is all pretty standard, but I haven’t yet seen it written up in an accessible format yet. Image obtained from Minecraft wiki.Īmbient occlusion was originally introduced into Minecraft as a mod, and eventually incorporated into the core Minecraft engine along with a host of other lighting improvements under the general name of “smooth lighting”. It has been a while since I’ve written about Minecraft-like games, and so today I figured I’d take a moment to discuss something which seems to come up a lot in online discussions, specifically how to implement ambient occlusion in a Minecraft-like game: Smooth lighting in Minecraft.
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