12/4/2023 0 Comments Door umbra designFewer draw calls (improves CPU performance).The result of applying occlusion culling is often: Once Unity knows which objects are occluded, well, you just don’t render them. Then, Umbra does occlusion queries against the data structures that contain cells and portals to determine which elements your camera can see and which ones are occluded (hidden). During run-time, Umbra takes the position of your camera to find in which cell you are at right now.We store this combination of cells and portals into data structures that we access during run-time. Finally, Umbra creates portals that connects these cells.Umbra creates cells out of these voxels by merging empty voxels, i.e.Umbra ” voxelizes” your scene to work with discrete elements instead of with a polygon soup.During Unity editor time, you bake occlusion culling.Unity uses an occlusion culling technology powered by Umbra. This technique will give you a beefier performance room to work with for the rest of your game :-) So, How Does Occlusion Culling Work in Unity? In this tutorial, you will learn how to use occlusion culling so that you stop wasting resources rendering objects that are occluded (hidden) behind other surfaces. ![]() The baking process takes take anything between seconds and hours. Unlike frustum culling, you need to bake occlusion culling in the editor.
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