Unreal Engine 5 Shaders and Effects Cookbook - Second Edition by Brais Brenlla Ramos
Author:Brais Brenlla Ramos
Language: eng
Format: epub
Publisher: Packt
Published: 2023-12-15T00:00:00+00:00
See also
As always, check out Epic Gamesâ documentation regarding decals: https://docs.unrealengine.com/5.0/en-US/decal-actors-in-unreal-engine/.
Creating a brick wall using Parallax Occlusion Mapping
Creating a more detailed level usually involves adding more geometrical detail to the objects used to populate it, something that can be achieved in multiple ways. Weâve already used Normal maps, a special type of texture that modifies the way light behaves when it reaches the surface of a given object. We also used Nanite meshes in the previous chapter, a novel method of bringing more triangles into our scenes. It is now time to explore Parallax Occlusion Mapping (POM), a texture-based approach to adding more detail to 3D objects.
This technique relies on textures to create more geometrical detail, in a process that might feel similar to using Normal maps. Unlike those textures, POM goes a bit further by actually pushing the pixels that represent our models outwards or inwards, creating a real 3D effect that we just canât get with Normal maps. Relying on images to do this kind of job frees the CPU from having to deal with more complicated meshes, something that can alleviate the burden on that specific piece of hardware. Weâll learn how to implement this technique in the next few pages.
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