3D Dynamic lighting (2026 roadmap) — what does it actually cover?

[Kindred68]

Hi,

I've been following the 2026 roadmap with interest, and I'd love to get some technical clarification on what's planned regarding the "3D Dynamic lighting" point.

The current 3D shadow and lighting system suffers from several issues that make it difficult to achieve a clean result in practice.

So I'd like to understand what's actually being planned:

• Does "3D Dynamic lighting" imply a real overhaul of the rendering pipeline, or mostly incremental improvements to the existing system?
• Is there any consideration for moving to WebGPU, which would enable more robust shadow techniques (cascaded shadow maps, etc.)?
• Is a proper PBR shading model with shadow casting from multiple light sources on the roadmap?
• Or is the plan to stay with Three.js and push its capabilities further?

Thanks in advance for the clarification.