Workflow for cutting holes in geometry and preserving normals

Mikhail Luzyanin wrote:

I prefer my because I can keep 4 side poligons as much as possible for better shading.

Using the Triangulate modifier by just adding it preserves the entire model, it keeps every 4 sided polygon in the viewport and in edit mode so hard surface modelling can continue, it also preserves normals whereas Triangulating in edit mode that you suggest actually triangulates the mesh there and then and destroys custom normals.
This modifier automatically gets “applied” when you export so there is no need to apply it yourself. The additional bonus is that by just having it on a mesh shows you what the model would look like (without applying it) in verge.

The rule here is never apply it as that WILL screw up the mesh. Because the Verge3D exporter sees the mesh as triangulated (because it applies modifiers on export) it must skip that process. The Blender triangulation modifier does a better job as it preserves the normals whereas the Verge3D exporter does not.

Hard to explain? sorry.

Please try it to see what I mean.

Hi Ivan, that is great news! will test it out. Thanks.