Feature request: shaded wireframe display mode

[echadwick-dgg3d]

I would like to see a new Debug Channel view mode, to see the wireframe. This would be very helpful to evaluate geometry compression methods.

It's not helpful to use a simple wireframe view, for example as used in the Three.js Editor, because it's difficult to visually assess the topology:

In DGG's current viewer (based on Babylon.js) we show black wireframe on white, which is occluded, and this is helpful:

However even better would be to have a gray model behind the occluded wireframe, to show both shading and wire at the same time, as is the case here in 3ds Max:

Hopefully this display mode would work with the glTF Compressor A/B slider, to compare before/after topologies.

[echadwick-dgg3d]

Demo of the wireframe mode in our viewer, see the dropdown at bottom left: https://api.rapidpipeline.com/viewer?id=5aDUSln0nC

[echadwick-dgg3d]

@lexaknyazev suggested perhaps this extension could be used (https://registry.khronos.org/webgl/extensions/WEBGL_polygon_mode/) however it doesn't work on Android devices.

Also the Babylon.js wireframe mode uses something implemented specifically for their engine, and not compatible for the glTF Sample Viewer.

Please correct me where I might have mis-heard anything.