Exploring the World of 3D Design with Three

Is there anyone out there who can assist me with three.js?

I am in need of drawing a background, something like a THREE.Sprite, but it needs to be positioned UNDER any 3D object that will be drawn later. I have a camera that can only move along the Z axis.

So far, I have tried:

  • using cube mapping shader - ISSUE: artifacts with shadow planes, and unstable rendering

  • creating a THREE.Sprite that mimics camera movement - ISSUE: artifacts with shadow plane, either edge highlighting or drawing other sprites without objects present

  • using HTML DOM Background - ISSUE: significant and unattractive aliasing in models

Any suggestions on what else I can try? Thank you!

javascriptwebglthree.js

Answer №1

One approach you might consider is breaking up your drawing process into multiple passes. For example, you could first render the background scene to a buffer and then overlay additional elements on top of that buffer in a separate pass. This technique involves using the initial buffer as a background and painting over it in 2D with an orthographic projection while disabling depth buffer writes for that particular pass.

Although I haven't personally tested this method with three.js, this is a common strategy used in "traditional" OpenGL programming.

Answer №2

For those seeking a dynamic "3d" background that tracks the rotation of their camera without responding to movement, using a cubemap is the only viable option.

Alternatively, an environment dome can also provide a fully 3d solution for this purpose.

If a static background is preferred, utilizing a simple HTML background should suffice. It's unclear why this approach would encounter issues or what you mean by 'aliasing in models'.

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