Snow doesn't form / cannot be placed on upside down slabs / stairs
When you have an upside down slab and it is snowing in the game, the snow will land on whole blocks but not upside down slabs. I believe that this is a bug because you can place red stone, torches, and other things on slabs, but snow doesn't fall on them.
Linked Issues
is duplicated by6
MC-9036can't place snow-layer-block on top of upside-down slabs and stairs but it should!DuplicateMC-9233Unable to place snow on top of upside-down slabs/stairsDuplicateMC-16393Carpets can be put on upside down half slabs but slow layers can'tDuplicateMC-74501Can't place snow on barrierDuplicateMC-74636Cannot Place Snow Layers On Top Slabs Or Up-Side-Down StairsDuplicateMC-4029Snow doesnt render properly on fences, stairs, and halfslabsDuplicate
- Fixed
Jon-Jacob
Maria Lemón- 41
- 12
- Confirmed
- placement slab snow
1.4.2 - 17w14a
1.4.2 1.4.4 1.4.5 1.4.6 1.4.7 13w04a 13w05a 13w05b 13w06a 13w07a 13w09a 13w09b 13w09c 13w10a 13w10b 1.5 13w11a 1.5.1 13w16a 13w16b 1.5.2 13w17a 13w18b 13w18c 13w19a 13w21a 13w21b 13w22a 13w23a 13w23b 13w24a 13w24b 13w25a 13w25b 13w25c 13w26a 1.6 1.6.1 1.6.2 1.6.3 1.6.4 13w36b 13w37a 13w37b 13w38a 13w38b 13w38c 13w39a 13w39b 13w41a 13w41b 13w42a 13w42b 13w43a 1.7.1 1.7.2 13w48a 13w48b 13w49a 1.7.3 1.7.4 14w02c 14w03b 14w04a 14w04b 14w05b 14w06b 14w07a 14w08a 1.7.5 14w10b 14w10c 14w11b 1.7.9 14w17a 14w18a 14w20b 14w21a 14w21b 1.7.10-pre1 1.7.10-pre2 1.7.10-pre3 14w25a 1.7.10-pre4 14w25b 14w26b 14w26c 1.7.10 14w28a 14w28b 14w29a 14w29b 14w30a 14w30b 14w30c 14w31a 14w32a 14w32b 14w32c 14w32d 14w33a 14w33c 14w34a 14w34b 14w34c 14w34d 1.8-pre1 1.8-pre2 1.8-pre3 1.8 1.8.1-pre4 1.8.1 1.8.2-pre4 1.8.2-pre5 1.8.2-pre6 1.8.2-pre7 1.8.2 1.8.3 1.8.6 1.8.8 15w31c 15w32a 15w32c 15w33b 15w33c 15w34a 15w34b 15w34c 15w34d 15w35b 15w35d 15w35e 15w36b 15w36c 15w36d 15w37a 15w38a 15w38b 15w39a 15w39b 15w39c 15w41b 15w42a 15w43a 15w43c 15w44a 15w44b 15w46a 15w47a 15w47b 15w47c 15w49a 15w49b 1.8.9 15w50a 15w51a 15w51b 16w02a 16w03a 16w04a 16w05b 16w06a 16w07a 16w07b 1.9-pre1 1.9-pre2 1.9-pre4 1.9 1.9.1-pre1 1.9.1-pre2 1.9.1-pre3 1.9.1 1.9.2 16w14a 16w15a 16w15b 1.9.3-pre1 1.9.3-pre2 1.9.3-pre3 1.9.3 1.9.4 16w20a 16w21a 16w21b 1.10-pre1 1.10-pre2 1.10 1.10.1 1.10.2 16w32a 16w32b 16w33a 16w35a 16w36a 16w38a 16w39a 16w40a 16w41a 16w42a 16w43a 16w44a 1.11-pre1 1.11 16w50a 1.11.1 1.11.2 17w06a 17w13b 17w14a- 17w15a
Created Issue:
snow doesn't form on upside down halfslabs
when you have an upside down half slab and it is snowing in the game, the snow will land on whole blocks but not upside down half slabs. i believe that this is a bug because you can place red stone, torches, and other things on half slabs, but snow doesn't fall on them. this bug happens in all gamemodes
Attachments1
- Unresolved
- Open
- Unconfirmed
- Survival
- bug survival_creative_bug
- 1.4.2 1.4.4
is duplicated by
when you have an upside down half slab and it is snowing in the game, the snow will land on whole blocks but not upside down half slabs. i believe that this is a bug because you can place red stone, torches, and other things on half slabs, but snow doesn't fall on them. this bug happens in all gamemodes. On double half slabs snow does form.
testing discovered
is duplicated by
testing discovered
is duplicated by
when you have an upside down half slab and it is snowing in the game, the snow will land on whole blocks but not upside down half slabs.ibelieve that this is a bug because you can place red stone, torches, and other things on half slabs, but snow doesn't fall on them. this bug happens in all gamemodes. On double half slabs snow does form.When you have an upside down half slab and it is snowing in the game, the snow will land on whole blocks but not upside down half slabs. I believe that this is a bug because you can place red stone, torches, and other things on half slabs, but snow doesn't fall on them. this bug happens in all gamemodes. On double half slabs snow does form.
snow doesn't form on upside downhalfslabsSnow doesn't form / cannot be placed on upside down slabs / stairs
is duplicated by
When you have an upside down half slab and it is snowing in the game, the snow will land on whole blocks but not upside down half slabs. I believe that this is a bug because you can place red stone, torches, and other things on half slabs, but snow doesn't fall on them.
this bug happens in all gamemodes. On double half slabs snow does form.When you have an upside down half slab and it is snowing in the game, the snow will land on whole blocks but not upside down half slabs. I believe that this is a bug because you can place red stone, torches, and other things on half slabs, but snow doesn't fall on them. This bug happens in all gamemodes. On double half slabs snow does form.
is duplicated by
![[Mod] Torabi](../../../data/assets/gravatar/torabi.png){kind=small}
is duplicated by
Snow doesn't form / cannot be placed on upside down slabs / stairs / barriers
is duplicated by
![[Mojang] Grum (Erik Broes)](../../../data/assets/gravatar/grum.png){kind=small}
Snow doesn't form / cannot be placed on upside down slabs / stairs/ barriers
![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
When you have an upside down
halfslab and it is snowing in the game, the snow will land on whole blocks but not upside downhalfslabs. I believe that this is a bug because you can place red stone, torches, and other things onhalfslabs, but snow doesn't fall on them.This bug happens in all gamemodes. On double half slabs snow does form.
Maria Lemón![[Mod] violine1101](../../../data/avatars/users/92858.png){kind=small}
relates to
Duplicate of MC-2813, please use the search function to see if your bug has already been submitted. Currently over 51% of tickets are being closed as duplicate.
Typing "snow slab" into the search field would have yielded MC-2813 as the third result. Do not type overly specific things like "can't place snow-layer-block on top of upside-down slabs and stairs".
Duplicate of MC-2813, please use the search function to see if your bug has already been submitted. Currently over 51% of tickets are being closed as duplicate.
Duplicate of MC-2813, please use the search function to see if your bug has already been submitted. Currently over 56% of tickets are being closed as duplicate.
Dupe of MC-2813
Relates to MC-2813.
This report should probably be consolidated into MC-2813, as they are essentially the same bug, just with different blocks.
In both 1.12.2 release as well as 17w50a, snow layers can be placed as well as forms naturally when it's snowing in according biomes on top of Command as well as Structure Blocks.
I'd have expected that blocks which are only obtainable and accessible via Creative means would not be affected by anything as usual (e.g. also explosions, fire).
Apologies if this was already reported, I searched around but could only find MC-117063, snow layers on barriers, which is not WaI according to Mr. Broes on MC-2813.
This is most likely because half-slabs are transparent. You will notice that snow also does not show up on glass, etc. Does this bug apply to double half-slabs?
Confirmed.
On all double slabs snow does form.
Nor can you place the new snow blocks on these, as of 13w05b
Seeing as redstone and rails can be placed on top slabs and upside down stairs this is more a bug than an unimplemented feature.
Fix
Pretty much a rewrite (at least when compared to MCP version).
And then remove some unnecessary checks in World:
... int blockIdUnder = this.getBlockId(x, y - 1, z); int blockIdOver = this.getBlockId(x, y, z); if (blockIdUnder != 0 && blockIdOver == 0 && Block.snow.canPlaceBlockAt(this, x, y, z) /*&& blockIdUnder != Block.ice.blockID && Block.blocksList[blockIdUnder].blockMaterial.blocksMovement()*/) { return true; } ...Note, added the glass block separately. Does not make sense to allow snow on top of leaves (pretty non-solid stuff), but disallow it on top of smooth solid chunk of glass, especially when torches have similar special check. Easy to remove if really not intended. Also, moved the leaves check to that simpler 'if', as it does not need to check for blocksMovement, at least for now.
I would have added ice, too, but noticed the specific disallowing in the current World.canSnotAt() method. Though I wonder why so, and wonder why the check was there and not in the method in BlockSnow.)
Changes tested on 1.4.7. Adding screenshot 'fixed_snow.png' to show results. Snow near the torches (except on furnace blocks) is hand placed, while the snow nearer has rained on the blocks.
In orger for this to generate, especially for regularly placed stairs, they would need to add "sub-blocks" in order to create the look of snow laying on the stair or on the regularly placed slab. This could cause crashing and lag.
A) This is issue is not about regularly places stairs (or slabs) (they are in the screenshots just for completeness/comparison).
B) To support regularly placed stairs or slabs, full support for sub-blocks is not needed - there are easier solutions, already used for e.g. raindrop splashes (although bit crudely) and aiming/shooting through the empty parts of stair blocks etc.
C) Even if sub-blocks would be used for B, it would not cause crashing and lag - crashing and lag is caused by bugs and poor design/implementation, respectively.
Please do not mark unreleased versions as affected. You do not have access to this yet.
Confirmed for 08a
Confirmed for 10c
Confirmed for 14w11b
Confirmed for 14w17a
Confirmed for 14w25b.
I also noticed that if you have one type of slab and try to place another (of a different type) on top, it behave differently than if you were placing the same type. It behaves as if the slab is a full block.
It would look strange if snow was hovering a half block above the ground, so it was probably disabled.
I think that the game can't store 2 separate partial blocks in one block of space
That is correct. A slab takes up a full block, even though it visually only occupies have the block. They've added special blocks to allow you to stack two identical slabs in the same block, but it's not possible to mix them because of how blocks are stored. It would be too many possible combinations for the 4-bit metadata each block is allowed.
However, an "upside-down" slab occupies the top half of a block space, so it should be possible for snow to form or be placed on top of it, without it floating.
Confirmed for MC 14w28b.
Also occurs with hoppers.
Confirmed for
Also for
The packed ice might be intended to be consistent with normal ice.
Confirmed for 15w43a
Barriers is Working as Intended. Removed from the ticket title.
The screenshot from the fix provided by Markku might be a little bit irritating
Marcono1234, please explain... Irritating? It has been there for years now, and I fail to find anything irritating in it, except the obnoxious falling snow disturbing the view... (Btw, I can not make a new screenshot of the fixed state; all my old various fixed MC versions I made back then are long gone now.)
What I meant was that having a screenshot of the fixed situation might make people think that it is fixed already. But it is probably not such a big deal
How do you know it affects 16w15b? You can't download it yet, it's in the process of being uploaded. (
Neither client nor server are downloadable ATM.)Edit: It can now.