Invisible Background on Sprite

Games
#1

My goal is to create a platform game with Corona. I created a sprite (a lemon shape character) on Photoshop Illustrator and exported it as a PNG file. When I included my sprite in the corona simulator, the sprite appeared normal. HOWEVER, when objects collided with my sprite, I soon discovered that an invisible square background was inclosing my sprite. There appears to be an invisible border around my sprite. The objects collide with the border and not the actual body of my sprite creature.

I remember making the background transparent in Illustrator but did not remove the background. Is this a problem that can be solved with Illustrator or Corona? What are the steps to solve this?

Thanks! [import]uid: 20373 topic_id: 6192 reply_id: 306192[/import]

#2

You can specify a custom shape when making the physics body:
http://developer.anscamobile.com/content/game-edition-physics-bodies#Polygon_bodies [import]uid: 12108 topic_id: 6192 reply_id: 21251[/import]

#3

Use the Shape Editor in Gumbo. Probably the easiest way to quickly create a polygon shape.

Gumbo [import]uid: 13180 topic_id: 6192 reply_id: 21259[/import]