>>363296982
>>363297606
Eevee can't bake tho
But yeah I had this issue with manually atlassing recently and an anon helped me with a "solution" where you bake the diffuse as normal then bake emission and use the emission in some way in photoshop to make the transparencies. I didnt really fully understand sorry.
I think what I'll do is continue to use 2.8+ but just do everything except bake it then just bake in 2.79.