@splash27 : I took a look in Blender 2.76 at the file in the link you posted above. Loads into Blender fine. Then I exported it to .babylon and tried to open it in the sandbox. I got this error message 6X :
BJS - [14:50:40]: Invalid magic number in DDS header.
I have no idea what that means - maybe @Deltakosh or one of the other Microsoft folks can tell us.
It turns out that there are 20 DDS textures exported and 2 of them are 10+MB in size and 2 are 5+MB in size. That is quite a load, but I have no idea which are the six that produce that produce those 6 errors.
The geometry looks OK but 75 bones is a lot of bones.
Given the issues with the textures, I just opened the exported the file from Blender with the Babylon Exporter and then opened the . babylon file in the sandbox - just by itself - no textures. See image below.
It loads with lots of checker textures substituted for the missing textures. With the panels open, I then went Select Skeletons->Metarig (A), then in the right panel select Animation Ranges->Click on an animation (B).
The animations play fine. So the issue seems to be with those DDS textures.
From the download site, I see some comments that it was ripped from a game - probably explains all those DDS textures. You could export them all from the Blender file as .png files. Then delete all the DDS files from the Blender file and replace them with those png files and try again. A lot of work I know.
There is also a TGA file. No idea if BJS can use those.
I’m not around a lot at the moment due to family medical problems