How to get the world coordinates in post progress？

[ZoeLeee]

I want to use post-processing to achieve the effect in the picture, but I can’t convert the coordinates to world coordinates in post-processing.

Babylon.js Playground

[Pryme8]

Depth Sorted Ray Marching PostProccess

Thanks to a little help from @Evgeni_Popov with my math and depth calculations, we were able to create a depth sorted post effect that will allow raymarched scenes to be rendered with your normal scene. https://playground.babylonjs.com/#6Z7SIZ#16 Lots of work to go into it still, but here eventually I plan on passing all of BJS standard material stuff to the ray marched surfaces and you will be able to hopefully not tell the difference for general purposes. -TODO: Volumetric Absorption Ref…

This is kinda the same idea, you might be able to covert parts of it.

Otherwise you can make all the meshes switch over to a shader that displays their world position, and then pass that as a texture buffer to the postpass.

there are a few other ways to do it to.

[ZoeLeee]

https://www.easonyi.com/demo/webgl/index.html?scene=scanScene

In threejs I use the following code to convert to the world coordinate system, the result is wrong in babylonjs.

 this.postMaterial.uniforms.projScreenMatrixInverse.value.multiplyMatrices(this.camera.projectionMatrix, this.camera.matrixWorldInverse).invert();

[ZoeLeee]

Optimized according to this prompt, it is close to the desired effect

Pixel position in world space from fragment postprocess shader issue

Welcome aboard! The depth renderer is rendering linear depth in the depth texture by default but you would need the non linear z value if you use it “as is” as the z NDC coordinate. You can instruct the depth renderer to render non linear z values by passing true as the second parameter to enableDepthRenderer: Note I’m not quite sure what you want to achieve with the vectorToPixel computation, I’m just returning the world space coordinate. If you want to use linear z values instead you can …

This is the current effect：

Babylon.js Playground

[ZoeLeee]

Optimize scanning effect

Babylon.js Playground