Mobs can't move onto certain blocks...?

[ShadowKitty42]

I just discovered something very weird. Although I saw it before, I thought it was an isolated incident, so I ignored it.

The first time, I was standing on the tiny edge inside the corner of a quarry, just watching it do it's thing. A zombie came up, and stood there next to me on the other side of the quarry frame. It just stopped, and I was very confused as to why it didn't jump over and attack.

Just now, I went AFK (admittedly, in an unsafe area) and a zombie had pushed me into a corner, onto a Secret TrapDoor (FTB Ultimate, Secret Rooms mod). I come back to see the zombie just standing there in front of me. He's even still standing there, as I make this post lol

Has anybody else discovered blocks that mobs simply refuse to walk onto?

 

[whizzball1]

I think that mobs not walking on secret blocks is a feature.

 

[ShadowKitty42]

I think that mobs not walking on secret blocks is a feature.

Well, it may be a feature for that mod, but what about the Quarry frame then? It was definitely high enough to jump over and come get me.

 

[whizzball1]

I'm pretty sure it's because of the nature of that block. It was never fully finished, to my knowledge.

 

[Chocorate]

I'm pretty sure it's because of the nature of that block. It was never fully finished, to my knowledge.

Is in that it is a frame, or the block in the mod was never finished?

 

[whizzball1]

Wait, I see:
The nature of the block is broken because it was never really finished.
EDIT: The frame is just like pipes, but it cannot move items, therefore, it should behave like pipes, in that Mobs can walk over it. But it does not. Therefore, it was probably abandoned or neglected.

 

[Poppycocks]

Yeah, it's vanilla behavior, I don't wanna get into how it's coded but it derives from that. Some block types are considered dangerous by the mob AI, it's was supposed to be a nerf to mobtraps where you used signs to fool mobs into thinking they can stand there and walk into a pit. It's mostly a matter of setting the right flags for your block.

 

[Chocorate]

Yeah, it's vanilla behavior, I don't wanna get into how it's coded but it derives from that. Some block types are considered dangerous by the mob AI, it's was supposed to be a nerf to mobtraps where you used signs to fool mobs into thinking they can stand there and walk into a pit. It's mostly a matter of setting the right flags for your block.

It's a trap, you'll see young Poppywalker, it's fully operational. -Spacetoad to Poppy, on quarry frame mechanics

 

[Vaygrim]

I don't know about WALKING, but I know that mobs won't spawn on specific blocks that have animated textures. For example.. if you use Xychorium Blocks for your flooring you'll never get mob spawns even in a dark room. Needless to say all my floors are Xychorium now.