Hello! everyone! I want to make a affect like cesium ground line/surface, like this [image] how to do it? Is there any idea or document

i had see this link Add Stencil Parameter to Materials by gkjohnson · Pull Request #15611 · mrdoob/three.js · GitHub and i have write code like it ,but it not work. code: stencil test (codepen.io)

[image] Stencil projection demo Showcase I had an interview recently and we discussed how would one project this spline representing a vehicles trajectory onto uneven terrain. I proposed something like stencil shadows instead of textures. This is a demo of that - there is …

material: depthFunc : THREE.GreaterDepth side: THREE.BackSide on a blue cube gets you most of the way to your screenshot. No stencil required. Greater depth means it will render only when its obscured by/behind the terrain… BackSide, means you’ll only see the back faces of the cube when it ren…

i have try it, and it see normal behind the terrain, but it will been saw in other direction [image] [image] it will not meet my require, because i want it stick ground only, and geometry not be saw in other direction. But i have admit it , its very instresting!

Wow ! it’s amazing! How does it work? when i remove code ‘scene.add(firstPass)’ , i think it will display here too, but it is not. [image] and i have a question, it’s shadow color depend on plane color, right? it means that threre only one shadow color even two different curve.

i have done it , here is demo result stencil test (codepen.io) main reference: Add Stencil Parameter to Materials by gkjohnson · Pull Request #15611 · mrdoob/three.js · GitHub [image]

How to use stencil test

Questions

mjurczyk September 4, 2024, 2:43pm 3

stencil is disabled by default since r163 (you seem to be using r168) - related. You have to enable it manually in WebGLRenderer constructor new WebGLRenderer({ stencil: true, /* ... */ }).

1 Like

Topic		Replies	Views
Clipping plane stencil capping Questions clipping-planes , stencil	6	350	June 23, 2025
Stencil buffer - how to make a mesh to be visible through another mesh only? Questions stencil-buffer	6	162	June 8, 2025
Webgl_clipping_stencil plane Questions materials	3	242	January 17, 2025
How to use a stencil buffer Questions stencil-buffer	8	9134	February 4, 2024
Stencil projection demo Showcase	2	334	April 10, 2024

How to use stencil test

Related topics