Is it possible to manipulate the depth buffer to make a 3D object behave the same way as a flat plane? For example, if you had a mesh and something in front of it, make it so that it was possible to position them in roughly the same z position in the scene but not have the mesh behind push through …

Yes, you can do this inside the vertex shader.

[image] adevart: make it so that it was possible to position them in roughly the same z position in the scene but not have the mesh behind push through the object in front? Maybe you can use Object3D.renderOrder here?

Do you know where the renderOrder overrides the depth buffer in ThreeJS? It renders opaque objects first then transparent and it sorts those lists by different parameters. So setting renderOrder should push an object forward in the sorted lists but where does the renderOrder property on an opaque ob…

It seems if you have a transparent object in front of an opaque one e.g red cube behind transparent plane and disable depthWrite on the front object, the renderOrder doesn’t have any effect as they are sorted in separate lists: var materialt = new THREE.MeshStandardMaterial({color:0xFF0000}); var g…

[image] adevart: If transparent objects are always rendered after opaque and a transparent object is further forward, how does an opaque object with a higher renderOrder get rendered in front? As mentioned in the documentation , you can’t do this with Object3D.renderOrder: This value allows …

Do you know which vertex shader renders into the depth buffer? I tried depth_vert.glsl.js but changing this doesn’t seem to have any effect. What I’d like to do is modify the vertices of an object when it gets rendered into the depth buffer.

1 you probably need to add gl_Position.z = …const; right before } 2 not in depth_vert.glsl.js but in your material.onBeforeCompile = function (tsk) { // here tsk.vertexShader = …

Is it possible to flatten an object in the depth buffer?

Questions

Usnul February 4, 2020, 8:00pm 9

@adevart

Writing a custom shader is a bit more pain that you seem to think, it’s fun too. There are a bunch of tutorials on that, I would recommend checking out the bookshelf

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Is it possible to flatten an object in the depth buffer?

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