Currently, when we export a room with, shaders have a prefix according to their blend mode/type following this formula:
Te + Op or Bl (+ DS)
where Op stands for Opaque and Bl for Blend Mode (I suppose) - and DS for Double Sided, which is optional.
For now, we only have the possibility to set ADDITIVE Blend Mode to a shader/texture when we do external editing using the Bl name.
My request is to have other blend modes available via these prefix, like Bl1, Bl2... or named more explicitly like BlAdd, BlSub, BlExc..
That way, we could have access to more possibilities, especially having the Screen to avoid too bright textures using additive, or the ability to force AlphaTest.
For rooms, it will be useful as we can't add specific blend mode on imported geometry directly in TE, and for object we won't have to set a specific blend mode one face at a time, which can be tedious especially for high resolution meshes.