When a part of the model is isolated using the FilteringExtension, the rest of the model gets transparent. Is there a way to show the edges, control the thickness of those edge lines, or control other styling like opacity, hue, etc.?
There is currently no built-in way to customise the material that gets applied on the non matching object ids when isolating. However, the viewer API offers alternative means of achieving this. I’ve made a live example that show this.
As for edges, if you are referring to actual geometry edges there is currently no support for easily displaying them, however we are actively working at the moment on means for edge rendering. We’ll keep you posted!