[OGRE-19] Mention that single cubic textures can be used when specifying texture units. For example, a DDS that contains all 6 faces.
[OGRE-19] Mention that single cubic textures can be used when specifying texture units. For example, a DDS that contains all 6 faces.

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branch : v1-9

digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre