How can I convert 'drawmode' form triangle to quad?

[manthrax]

Quad rendering isn’t supported.

Quad rendering within Three.js?

Apologies if this was understood and you’re asking about the higher-level APIs three.js provides, but I’m sure some reader will not know this, so just to clarify the lede – WebGL draws triangles, points, or lines – but not quads. This remains true in WebGPU as well.