I now want to achieve something similar to the image below, but I only want to keep the inside of the area instead of outside of the area [image] Since the area requiring mask is irregular and may be a very complex polygon, such as the border of a province or city, I want to use stencil buffer to…

One possible way is to define the boundary as a shape and then extrude it with THREE.ExtrudeGeometry . I used this approach in a small library for making maps. https://boytchev.github.io/map/ Example: [image]

Thank you, but things are a little different, I need like this. https://forum.unity.com/threads/cull-rendering-between-camera-and-stencil-mask.544280/

Would CSG (Constructive solid geometry) help?

Is there any code example for this

[image] Three-bvh-csg: A library for performing fast CSG operations! Resources Hello! I want to share the three-bvh-csg project - a library designed to support fast, arbitrary boolean construction-solid-geometry operations between arbitrary geometries! The project uses thr…

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PavelBoytchev March 6, 2023, 8:58am 6

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