# This script resets all mesh and face flags in the current scene to:
#  - opaque       (Opaque button pressed)
#  - single-sided (Twoside button NOT pressed)
#  - not "hard"   (Collision button pressed)
#
# To use:
#  - Open a Blender "Text Editor" window.
#  - Open this this script in the "Text Editor" window (File -> Open).
#  - Execute the script (File -> Run Python Script).
#

import Blender
from Blender import NMesh

for object in Blender.Scene.getCurrent().getChildren():
    if object.getType() == "Mesh":
        mesh = object.getData()
        mesh.mode = NMesh.Modes.NOVNORMALSFLIP
        for face in mesh.faces:
            # Remove # from next line to turn faces smooth
            #face.smooth=1
            face.mode = NMesh.FaceModes.DYNAMIC|NMesh.FaceModes.TEX
            face.transp=NMesh.FaceTranspModes.SOLID
        mesh.update()

Blender.Redraw()