Available Block/Item IDs

I'm doing some work modding, and because what I am making has a ComputerCraft peripheral in it for control and it is kind of aimed at a ComputerCraft/"tech" mod audience, I'd like to see what IDs people have available (I want to make this for 1.6.4, and I will port it to 1.7 after) so I have as few conflicts with other mods as possible, even though it's impossible to totally eliminate them.

If you wouldn't mind, here's how to get the list of available IDs through NEI:

1. Open your inventory and press "Options" near the bottom-left corner (if you don't see it, try pressing the "O" key)
2. Press "Tools" in the list, then press "Data Dumps"
3. Beside "Blocks/Items", press "All" or "Used" until it says "Free". If it already says "Free", great.
4. Hit "Dump".
5. Open your Minecraft directory, go to the "Dumps" folder, and open up item.csv in a Plain Text editor (the one you use for Lua coding should work just fine and might even have a syntax highlight, but that's not necessary.)
6. Copy the content of that file and paste it in spoiler and code tags

It'd be more useful to check out where the gaps are in some of the major packs (FTB packs, I'd suggest) than to get a random smattering from the forums.

Just choose any range from 256-4096 for blocks and items, or 256-32000 for plain items. Item IDs are very easy to change, and are being phased out in new updates anyways. Don't worry about conflicts too much: they're not as common as you'd think, and take a minute to fix.

Yeah, I checked out the IDs in FTB Monster + OpenComputers, I'm currently going for 17000-(how many I need)

awsmazinggenius, on 03 May 2014 - 02:39 AM said:

Yeah, I checked out the IDs in FTB Monster + OpenComputers, I'm currently going for 17000-(how many I need)

Keep in mind that block IDs should generally be below 4096. Don't ask me why.

Oh. I've seen plenty of blocks with higher IDs, but I can probably accomplish that nonetheless.

awsmazinggenius, on 03 May 2014 - 01:20 PM said:

Oh. I've seen plenty of blocks with higher IDs, but I can probably accomplish that nonetheless.

Also keep in mind that in 1.7 and above, the whole ID system is different…

(all pre 1.7): Blocks can have IDs from 0-4095, but you should only use 256-4095. Items can have IDs from 0-65536, but you shouldn't use some number of them at the beginning that I can't remember. If a block seems to have an ID greater than 4095, that's because the item has a different ID than the block - the item's ID is greater than 4095 but the block's ID is between 256-4065.

Forge does funny shift-by-256 stuff, so these IDs might all be shifted - you may have seen a block ID with id 4200 = 3944+256.