BLACK OUTLINE AROUND THE EDGE OF ASSETS

 STEP 0NE: HAVE YOUR ASSET TEXTURED

STEP 2: DUPLICATE YOUR ASSET AND PUT A BLACK MATERIAL ON IT AND SCALE THE DUPLICATE SO IT FULLY COVERS THE TEXTURED ASSET.

   STEP 3: SELECT THE BLACK DUPLICATE AND REVERSE THE NORMAL, TO DO THIS GO, NORMALS  > REVERSE

STEP 4: COMBINE YOUR ASSET TO ITS BLACK DUPLICATE, THEN EXPORT AS AN FBX

TEST IN UNITY TO MAKE SURE YOUR YOUR HAPPY WITH THE SCALE OF THE BLACK LINE AROUND THE EDGE, IF ITS TOO SMALL GO BACK IN TO MAYA UN COMBINE AND THEN RE SCALE THE BLACK DUPLICATE THEN TRY AGAIN.