Blender export - vertex colors

[Sasha]

Hello. I want a dynamic changing of vertex colors in babylonjs. How do I export all variants of vertex colors for one object from blender to babylon? After exporting I found only one one-dimensional array.

[GameMonetize]

Hello, this is not supported directly for now. But you can still edit the vertex colors of your mesh using Javascript with mesh.getVerticesData()

[JCPalmer]

Did a quick look at the code. @Deltakosh wrote  the vertex color part & I never needed to change it.  Yes, it is using the "active" one

Colormap = mesh.tessface_vertex_colors.active.data

This implies that there is a collection of them in Blender.  Unfortunately for you, the .babylon file format only holds 1 of positions, normals, colors.  It is open source, so you could change this, but then you would have to have a place for these spare parts to go.  This is a big job for a first Pull request.

The only practical hope I see is to export multiple times with a different variant set as active.  For all but 1, export & edit each to copy out the data of the colors.  I recommend the using the source code exporter, Tower of Babel, at least for giving you the syntax of how you load vertex colors.  I will not show you, since TOB already documents the syntax.  Good luck.