03-14-2016, 08:10 PM
Flipping the texture is okay as long as you flip the UVs to go with it.
As for a modeling program, Blender is a good free option, though it seems a number of people have issues with its DAE exporting.
As for a modeling program, Blender is a good free option, though it seems a number of people have issues with its DAE exporting.