[MC-53641] Smooth and cut blocks and slabs do not match properties of their stair and full block versions

The bug

Smooth and cut blocks and slabs do not inherit the properties of their base block, instead they appear to use properties similar to stone.

This means that for example their mining speed and blast resistance can be incorrect.

This could possibly be solved by changing smooth blocks and slabs classes to be wrapper like stairs.
Note to devs: There are also a lot of blocks which do have the correct properties, but do not inherit them, but instead declare them themselves. Would be good if this was fixed as well.

Affected blocks

Last updated for 1.15.2

Nested entries in parentheses ((...)) correctly inherit the base block properties, but are affected because the base block has incorrect properties.

smooth sandstone (not the same as sandstone)
- (smooth sandstone stairs)
- (smooth sandstone slab)

smooth red sandstone (not the same as sandstone)
- (smooth red sandstone stairs)
- (smooth red sandstone slab)

sandstone slab
cut sandstone slab
red sandstone slab
cut red sandstone slab

smooth quartz block (not the same as quarz blocks)
- (smooth quartz stairs)
- (smooth quartz slab)

quartz slab

stone slab: Destroy time of 2 whereas stone and stone_stairs have 1.5

stone brick slab

purpur slab

How to reproduce

Give yourself a wooden pickaxe
```
/give @s wooden_pickaxe
```

Give yourself mining fatigue level 2

/effect give @s mining_fatigue 1000 1 true

Place a slab and its base block

/give @s sandstone
/give @s sandstone_slab

Switch to Survival mode
```
/gamemode survival
```
Start destroying the blocks and compare the mining speed
→ ❌ The slab takes much longer to mine

Linked issues

is duplicated by 18

MC-280447 Sandstone slab has a higher blast resistance than a full sandstone block Resolved

MC-274905 Smooth Quartz not Insta Mineable (but other quartz variants are) Resolved

MC-262365 Slab mining speed with haste/efficiency does not match similar material's full block mining speed Resolved

MC-202182 Smooth sandstone isn't as hard as normal sandstone Resolved

MC-199590 Various slabs cannot be mined instantly, whereas their block and stair counterparts can Resolved

13 more links

relates to 3

MC-171534 Beacons are not part of #minecraft:mineable/pickaxe Open

MC-11027 Axes accelarate the speed at which Slabs are broken Resolved

MCPE-42899 Smooth Sandstone & Smooth Red Sandstone have wrong hardness Resolved

Attachments

Comments 55

Ben 2014-04-26T01:03:52Z

Why would something this ridiculous be intended?
My mistake if it is, I thought surely the game shouldn't mean to be this illogical.

Tyler Bozinovski 2014-05-23T08:02:31Z

It's not intended. Read my issue to find out more! (MC-55480)

qmagnet 2014-05-23T20:42:55Z

Also the blast resistances aren't right based on the same issue.
Sandstone and Quartz slabs don't follow the same properties as their full blocks.

Tyler Bozinovski 2014-05-23T22:36:51Z

Except it has been crossed out. 😞 But that doesn't mean you can't read and comment on it. 🙂

Tyler Bozinovski 2014-05-23T22:38:40Z

This doesn't explain the higher blast resistance so my issue is kind of more better. It also has a lot more information.

45 more comments

qmagnet 2014-05-23T23:34:22Z

It's not a competition on who has more info. The bug should be expanded to explain all problems with it. So this description should include info about the blast resistance as well. And I think the title should be more clear that "Slabs do not properly represent Block properties"

Tyler Bozinovski 2014-05-24T03:02:56Z

I know.

Tyler Bozinovski 2014-05-24T03:03:48Z

I'm also the reporter, not just Ben.

Tyler Bozinovski 2014-05-24T03:06:24Z

So, and stairs don't take 3/4 long to mine than their full blocks. Stairs perfectly match properties of the full blocks, but slabs don't.

Tyler Bozinovski 2014-05-24T03:07:43Z

Oh, and how do you access Minecraft's code?

Tyler Bozinovski 2014-05-31T09:43:29Z

Also affects the double slab versions and the double full sandstone slab.

Dlawso the Really Lucky Rabbit 2014-07-11T04:45:28Z

According to the MC Wiki, both the mining part and the blast resistance part are indeed intentional.

http://minecraft.gamepedia.com/Digging#Blocks_by_hardness

Following is from the Wiki page regarding slab behavior:

"Due to the way blast rays propagate from an explosion, slabs provide extremely effective absorption to explosions directly on top of them. Specifically, this is because explosive entities will be lower in elevation when they explode on top of slabs than they would otherwise be on an ordinary block. Although the few slab(s) directly under the explosion will absorb the full force of the blast (with a resistance of 30) as usual, the propagation of damage to the sides will be greatly reduced. If source of the explosion is elevated for any reason at the time of the blast, this protective quirk is lost."

qmagnet 2014-07-11T12:52:15Z

@Blah the issue isn't arguing that the wiki is wrong. The issue is that slab materials should logically match their full bock counterparts. The wiki does not state that Mojang intentionally made slabs more blast resistant. It simply states how slabs are currently more blast resistant. The OP is simply saying this doesn't make sense. I tend to agree with him and I think Mojang simply threw in the other slabs for aesthetic purposes but didn't keep in mind the properties.

Having said that, the wiki link you posted does not show the properties o the quartz slab or the sandstone slab - which reportedly have the same properties of the stone slab.

At least this is the argument for the second part of the bug.

Tyler Bozinovski 2014-07-21T22:59:59Z

Mojang needs to fix this!

Sonicwave 2014-09-16T03:59:01Z

Confirmed for 1.8. Affects double slabs also.

Dlawso the Really Lucky Rabbit 2014-11-02T21:04:36Z

WAI per Tails from MC-9800:

Sandstone slabs share the data value with stone slabs and are therefore harder to break.

In Lehman's terms, this applies to all slabs which share the data value of stone slabs.

Sonicwave 2014-11-02T21:58:14Z

Also might be unfixable/unchangeable since changing the properties of each slab might require adding id/data values for each slab (that was what happened when they fixed wooden slabs):
http://minecraft.gamepedia.com/Slabs

kumasasa 2015-11-22T21:19:56Z

Is this still an issue in the current Minecraft Snapshot 15w47c or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Tyler Bozinovski 2016-01-22T05:06:54Z

I think this is still in 16w03a.

Tyler Bozinovski 2016-01-22T08:16:51Z

Also, there is a similar issue where end stone bricks are as weak as sandstone (blast resistance 4), yet regular end stone is a lot stronger (blast resistance 45).

wobst.michael 2016-10-22T19:48:57Z

Is this still an issue in the most recent versions (currently that is 1.10.2, or 16w42a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time.

muzikbike 2018-07-28T13:44:15Z

Still affecting the full release of 1.13

Kraif 2018-09-01T19:31:36Z

Confirmed for 1.13.1.

muzikbike 2018-09-21T10:14:12Z

Should be much easier to fix as of 1.13 due to the data value splitting.

Capopanzone 2019-11-12T17:14:36Z

Still an issue in 19w45b. This affects the hardness and blast resistance of:

• smooth sandstone
• smooth sandstone stairs
• sandstone slab
• cut sandstone slab
• smooth sandstone slab

• smooth red sandstone
• smooth red sandstone stairs
• red sandstone slab
• cut red sandstone slab
• smooth red sandstone slab

• smooth quartz block
• smooth quartz stairs
• quartz slab
• smooth quartz slab

marcono1234 2019-11-16T19:29:53Z

Not going to mark it as related because a block tag (dragon_immune) is used to control that, whereas this bug has to be fixed in the code (at least currently).

muzikbike 2020-01-11T03:03:45Z

Shouldn't this ticket also affect other blocks, but to a much smaller degree? Compare the mining times of stone and cobblestone with stone slabs and cobblestone slabs

marcono1234 2020-01-19T18:03:18Z

@@unknown, could confirm the different times for stone and stone slab and added it. However I don't see (in the code) a difference between cobblestone and cobblestone slabs.

muzikbike 2020-02-06T07:37:41Z

Those were for comparison purposes for each other.

wilmerkardell 2020-02-07T15:40:15Z

This also affects:

End Stone Slabs (Should be Hardness 3 and Blast Resistance 45)
(Mossy & normal) Stone Brick slabs, (Smooth & normal) Granite, Andesite, Diorite & Stone slabs, Prismarine (Normal, dark & brick) slabs, and Purpur slabs (Should be Hardness 1.5 and Blast Resistance 30)

Currently all Stone-type slabs inherit the Hardness 2 and Blast Resistance 30 of Cobblestone.

Roadhog360 2020-02-08T20:29:30Z

All of it still is prevalent in 20w06a

marcono1234 2020-02-13T16:51:12Z

@@unknown, you already commented that November last year. And my response still applies: Dragon immune blocks are controlled using a block tag and not hardcoded in the game code.

marcono1234 2020-02-13T18:24:06Z

@@unknown, based on the 1.15.2 code I could only confirm

stone brick slab
purpur slab

PancakeIdentity 2020-04-08T19:02:30Z

Affects blackstone slabs and polished blackstone brick slabs, though not polished blackstone slabs.

PancakeIdentity 2020-04-08T21:21:45Z

Tested for slabs in 20w15a. It's not affected unless explicitly stated. Doesn't take into account cases such as the smooth blocks as the slabs are the same as the smooth blocks, but not the unsmooth blocks.

Stone, Smooth Stone, Stone Bricks, Purpur, Blackstone, Polished Blackstone Bricks: 1.5
- Slabs: 2
(Red) Sandstone, (Red) Cut Sandstone, Quartz: 0.8
- Slabs: 2

Avoma 2020-11-27T18:30:13Z

Can confirm in 20w48a.

Brevort 2021-01-17T20:22:23Z

I like this feature because I can put my redstone on double stone brick slabs and not have to worry about it while instamining. I know if I hit a stone brick that doesn't instamine, it has redstone on it and I shouldn't break it.

On a past bug, someone resolved it and said it was invalid because it didn't hurt anything and made the game more interesting by allowing more variety. I think this bug may apply to this category since it is sometimes advantageous to have identical blocks that break slower and you have the choice to use double slabs. Though that is not up to me.

Avoma 2021-01-22T19:30:00Z

Can confirm in 21w03a.

Avoma 2021-02-06T14:09:26Z

Can confirm in 21w05b.

Avoma 2021-02-12T14:02:26Z

Can confirm in 21w06a.

Avoma 2021-02-19T11:32:55Z

Can confirm in 21w07a.

Avoma 2021-02-20T16:59:12Z

Video attached.

Avoma 2021-03-29T13:59:10Z

Can confirm in 21w11a.