Yet putting a vertical shadow may be heavier on the CPU and Ram consuming...
Example *Examples : It was used in **Batman : the Movie (OCEAN) in the Batwing level (4th level, horizontal oblique) so you can see your altitude. **Hydrofool : as you float in aWater environment, the game would be unplayable without this shadow (just look at the picture, yellow shadow...) to see your coordinates in the X/Z plane and judge at which height you are swimming.
==Level design==