Hi,

I can't open chest if there is a slab or a stairs on it.

Vanilla :

I can open the chest in all the cases :

With Forge I can only open the chest who has glass on :

(sorry for this horrible gif recorded with my smartphone)

 

Tested with Forge #1673, no mod.

Its intentional, because the bottom of the block is solid, which blocks opening chests but also allows for placing buttons and levers and stuff. Special casing it would be really really painful

This is a change that we have had in place since the beginning of Forge. if you REALLY want to get the same effect with stairs, just place inverted stairs.

The chest checks if the BOTTOM of the block is solid, if not then it allows it to open.

The bottom of normal stairs and bottom slabs are indeed solid. We consider this a bug fix to a longstanding vanilla bug.

Thank for your reply. Indeed it's more logical like this since we can't open a chest below a stair in real life

I didn't notice that this feature is implemented since Forge 1.8 #1651.

Its been in forge since 1.2.5 at least.

really o_O ?

In Forge 1.8 and 1.8.8 (I don't remember which version of Forge I used) it's was possible to open chest even if there were a stair over.

Yes, that was a bug that was fixed once it was reported: https://github.com/MinecraftForge/MinecraftForge/commit/d2248c3774713bb0f5931504ceb2382e41566c62