Convert .wrl (VRML) to .dae (COLLADA) using MeshLab results missing colors

Question

I used MeshLab to open a VRML .wrl model. The model was shown just fine in MeshLab. My goal was to convert .wrl to COLLADA so I can later import .dae into Unity or SketchUp, hoping I can have a working mesh with colors, see Image 1 below.

I tried to export mesh using MeshLab as COLLADA (.dae), but when I opened the .dae file in SketchUp or Unity, colors won't show up. I did see all colors in MeshLab just fine. What did I miss? Your help will be greatly appreciated.

This is how the model looks like in MeshLab:

This is how the .dae file looks like in SketchUp:

Answer 1

did you try to open the dae file produced by meshlab with a text editor to check if color are present in the dae file ?

Answer 2

I don't know if this is what you are looking for, but I stumbled across a solution accidentally that works for me. What I wanted to do is to embed the 3D model of a PCB I designed in KiCAD in a PDF.

I needed a U3D (universal 3D) for embedding in a PDF, but after exporting it, I always ended without colors. The happy accident I stumbled upon is when I changed the "FILL COLOR" in the right panel, from "vert" to "mesh".

This made the model in the viewport look gray,

but after exporting it to U3D, and checking the "Vert COLOR" box in the saving options, the U3D model got the colors!

IMO this is a very weird behavior that should be changed immediately.