Crystal Noir

Thank you for all your replies

This is not my modpack, and there isn't any in 1.7 for now. But it should be better if I could code for 1.7. I'm just make some personal mods for us and for fun. And the map and pack we play are in 1.6.4 :-s May be I should concentrate myself on 1.7 but if I want us to play with my small mod I have to make it compatible.

Don't have choice for now, we play with 1.6.4 modpacks. A bonus question please : In 1.7.X version we don't have to choose an ID but in my mod if I change an item or a block, when compile is minecraft will now that is the same tool upgraded or will it create a new id ?

Thank you for your replay. I understand. But for now, I code for 1.6.4 to make my mod compatible with somes modpack and I try to understand how to choose one in this case. Is there many rules or something special or I have to try myself and change if there is a problem ?

Hello all, I am new in minecraft mod making and I try to follow the wiki's tutorials. But I have a small question regarding ID. I understand that ID's represent an identifier for a block or items. But how do modders choose an ID for their blocks ? I mean, imagine a brand new big modpack with 50+ mod how to be sure that our mod will work with these pack. I don't understand how these ID are managed. Thank you in advance for your help, (Sorry for my english....)