Is there a demo to show How to pathtrace user model (By using three-mesh-bvh)?

[cuih]

you know, I just want to use gpu pathtracing.

by chance， I find the three-mesh-bvh, and his demo “gpuPathTracing”. BUT some error raise from “mergeGeometries”.about “.attributes”. I cant solve this.

[Oxyn]

This could be the cause (just a guess), try to follow the steps on this old post to see if it match your case. Then use the function I mentioned (deinterleaveAttribute) to obtain correct geometry attributes to process your merge. This post was about Ammo physics engine, but the issue is similar to classic BVH model preparation.

How to add Ammo.js Physics to MD2Character?

that’s a pretty old version The first step is to output a log of your mesh in your browser, something like: console.log(myMesh) Ammo need a specific geometry attribute: Float32BufferAttribute, and I fear yours is not compatible. This is a common issue when using mesh from loaders (like GLTF and other add-ons) [image] A possible fix is to use a hidden function from BufferGeometryUtils.js https://github.com/mrdoob/three.js/pull/23814…