gives pumpkins and jack-o-lanterns a lantern texture

Since pumpkins and jack-o-lanterns have only an aesthetic and light source value within the TFC mod, it'd make sense to make them more visually appealing. Players seeking an eternal light source are reluctant to use jack-o-lanterns because of the unappealing default texture. This change to the pumpkin textures should allow players to more freely illuminate their works.

Lantern texture acquired from:
http://painterlypack.net/materials.php