IDEAS FOR RYZOM

I want to enumerate the technical and Lore reasons why a tribe could not steal Kara AntiGravity technology and sell it to players with a healing or offensive (or forage) Mastery.
Rendering a player at a specified height is not the problem, I want to find out what are the "Actual" problems associated with flying:

• Lore: Players are meant to experience Atys from the ground but after they get to level 250 it might be cool to fly?
• Technical: Collisions are handled at ground level - disable collisions where the player is above the object (players minimum Zpos is greater than the top of the bounds (skeleton?) of the object being consider for collisions)?
• Technical: The altitude of the player needs to be added to the "Properties" of the player so other players render them at the correct height.
• Technical: what will happen to shadows??
• Technical: Boundaries - I suggest that a flying player will be affected by strong downdrafts as they near boundaries, the player will be forced to the ground and prevented from crossing the boundary. Crossing a 2cm high boundary might be nice.
• Technical: Can a player fly when indoors - how to prevent a player from descending through a roof? Can the collision system force the players altitude to increase when they try to descend into an area where a collision is detected.
• Lore: What is more appropriate "AntiGrav Boots" or a "Flying Mount"?
• Social: When a players account reaches level 250 can his "Alts" fly also?
• Technical: Animations need changing. Do the boots need any particular visual properties - rocket exhaust flames or a glow or sparks...
• Technical: how is the roof height defined in PR and how is the "upper levels" defined so we can handle or prevent collisions at high altitudes?
• Monetary: Can unsubscribed level 250 players still fly?
• Technical: Can flying players be attacked by magic.
• Technical: Can flying players be attacked by melee.
• Technical: Can flying players use magic to attack NPC's or mobs on the ground?
• Technical: Can flying players use melee to attack NPC's or mobs on the ground?
• Technical: Can non-flying players initiate AntiGrav during a fight?