kiss3d | Keep it simple , stupid 3d graphics engine for Rust | Graphics library

You can get a scene from a window with the Window::scene_mut function, which will return a SceneNode.

After you get your mutable scene node you can delete all the objects inside of the scene with the SceneNode::apply_to_scene_nodes function.

As documented in kiss3d docs page:

fn apply_to_scene_nodes_mut(&mut self, f: &mut F)

Applies a closure to each object contained by this node and its children.

This is the method that takes closure in it and applies it to the all nodes inside to scene. So you don't need to add all the objects to a Vec.

Note that this method is working recursively to apply the function you provided to all the childrens of the parent and itself.

In your case it is only needed to unlink the parent scene like following: