whats is the problem, screenshots and description of the problem would help. I have some experience with multi uv tile in both 3dsmax and Maya that might be able to help you.
You can use Knald, or Substance Painter/Designer or something like Faogen, Topogun, even 3dsmax render to texture to generate AO (that might even look better)
I almost forgot about this, a while ago I wrote a detailed step by step tutorial on how to do this in 3dsmax. http://www.polycount.com/forum/showthread.php?t=66993
On a site note, is there a valid reason why 3dsmax can't undo a reset xform? Maya has no problem undoing freeze transformation, don't really see how that's different...
3ds Max 2023 includes a glTF Material, you should be using it. This material has controls for Alpha Mode, and mimics glTF rendering, in the Max viewport. https://help.autodesk.com/view/3DSMAX/2023/ENU/?guid=GUID-7ABFB805-1D9F-417E-9C22-704BFDF160FA
3dsmax is also good then? `ll take a look in this software, thank you! @Hauddasalami Yeah I heard that before, if we have the job done it`s ok. @AABel thank you!