I like this idea and an ideal way to implement it is via a new menu you can access just like avatars. Ideally, I think the upload process should use something like maybe "Accessory Descriptor" with the following properties in the component:

Limit to avatars []

(List of avatar IDs the item is limited to)

Spawn local only []

(could have its uses)

Weapon []

(does damage if a user has a new optional pvp mode turned on)

Weapon Colliders[]

(can be a physic collider for melee or a colliding particle system for guns)

Damage[]

(no limitations since you can just block a user who is abusing it with a 1000 damage weapon that reloads instantly)

Vehicle []

(CAN be used with weapon for things such as tanks but allows a VRC station to be added and the item driven around. few properties to control speed and collision bounciness should be added too)

Item Health[]

(If unused item cannot be destroyed. Useful so the item can be destroyed by being damaged too much)

Spawn Already Held[]

(useful so you could make it play an animation and spawn already held in your hand-just for looking cool)

Shareable[]

(All-Friends-Only You - the item can be held and shared between everyone, friends only, or just you)

Spawn limit-

6 max per user at one time

1 vehicle max at one time (maybe due to size count this as 2 items)

2 weapons max (if item is also a vehicle it uses 2 (or 3 if vehicle takes up 2) spaces)

Since the pvp option could be added, maybe add a new option to block user items if they are abusing it.

If this is considered, I'd like to see it with limitations to prevent people from having objects that cause performance issues or even crash people.

Having IK points on the item would be useful as well for auto positioning fingers in the correct manner on curtain objects. IE, if a gun is told to animate its shooting, the ik point for the finger would allow any avatar to pull the trigger with their finger.

hmmm... okay, maybe if there are limits to what it is that you can pull out.

5,000~10,000 poly objects maybe?

its collision (if you can drop it on the ground) should be calculated on the bounding box of the object. (this limits the complexity of the collisions.)

object type trees should also be introduced

for example, a 'weapon' category, and then 'type of weapon'. (such as ranged, melee, or explosive, etc. this category would need a 'handle descriptor' so the game knows where your character grabs the object at. and depending if it's a ranged weapon, it would also need a 'projectile spawn descriptor'

the projectile will need to have its own model, or it will assign a default projectile.

this could also be used for a 'drone' object that follows you around. (drones don't despawn unless you put it away) they lack collision, but try to avoid things with collision. (such as walls) they teleport to you if you get a certain distance away from them (this is for when you go through a door that has collision.)

this could also enable people to give each-other objects, or, if possible, have objects in worlds to give to people. (this could be for people who don't know how to use unity, or modelling software. however the objects you can 'save' are limited, just like the amount of avatars)

i'd really love if you could have a separate section in the sdk to upload items like swords, guns, pens, etc, with its own effects and sounds that can be triggered by a click or some other feature, and you could chose to spawn it whenever you feel like it in a menu, with any avatar, obviously only one at the time and whenever you re-spawn it it'll just teleport to you, but after a few seconds of you not holding it it will de-spawn, it'll de-spawn whenever you spawn other item as well so people can't abuse it, overall this is a great idea that i think a lot of people would love, and like the public avatar cloning thing, i think you could share your items with friends if you want so, and also as a security thing to avoid lag, in the security-tab you could choose to de-activate all items too, or to only see friends' items.

i think that in the end if this gets added, i think the game will get closer to "Ready Player one" in some aspects, and this, combined with possible pvp, it'll get lit

I miss the inventory system I saw in an early trailer for vrchat. Shame I never had the chance to try it out.

Similar:

I've been asking for this for about a year now. If they ever add something like this, I really hope these items would depend on users rather than worlds.

An inventory to carry a few of these objects would be pretty cool, too