[MC-50129] Parts of semi-transparent models (slime blocks, stained glass) are rendered in the wrong order when in third person or in hand

Semi-transparent model parts are rendered in the wrong order when viewed in third person or when held in first person.

From certain locations, semi-transparent blocks with multiple parts, notably plains, are rendered in the wrong order.

In the screenshot, the "plains" are on top, then the lower "block", then the upper "block", instead of the upper "block", the "plains", then the lower "block".

In the third screenshot, the upper block appears behind the lower block, it is location dependent though.

Steps to reproduce:

Apply a solid texture to the slime block, or use the provided debug pack
In hand
1. Hold a slime block in your hand
2. Notice the center cube is sticking out at you.
In third person
1. Hold the slime block in your hand
2. Notice countless errors in it's rendering

Edit in 14w30a: Fixed the incorrect rendering every sixteen blocks vertically, which causing the upper block to render behind the lower block.

Linked issues

duplicates 1

MC-44373 Slime Blocks render incorrectly in third person or in hand Resolved

Attachments

crash-2014-03-04_15.25.11-client.txt

MC-50129 Debug Pack.zip

Comments 16

kumasasa 2014-03-04T07:02:16Z

What block is that ?

KnightMiner 2014-03-04T14:28:38Z

Slime block, but it also works with stained glass. I think it's always been happening, but since it was transparent, it was not noticed.

KnightMiner 2014-03-04T14:40:20Z

Here is a screenshot of the slime block by default, not how bright the one in the back is.

kumasasa 2014-03-04T20:18:41Z

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) here.

Please attach your resource pack.

KnightMiner 2014-03-04T21:25:33Z

Resource pack with all affected

6 more comments

KnightMiner 2014-03-04T21:26:39Z

Crash report.
Something to note (just discovered), the issue with the blocks placed in the world only happens at y=80

kumasasa 2014-03-04T21:43:08Z

I'd say your slimeblock.json model is buggy.
Happens too after switching off your resourcepack (the models won't be reloaded until restart, but that another issue)

slimeblock.json

{
    "__comment": "Fair warning, this format is highly likely to change even more in the future!",
    "name": "slimeblock",
    "elements": [
        {
            "__comment": "upper body",
            "type": "cube",
            "from": [ 0, 12, 0 ],
            "to": [ 16, 16, 16 ],
            "shade": [ 0.5, 1.0, 0.8, 0.8, 0.6, 0.6 ],
            "uv": [
                [ 8, 0, 16, 8, "down" ],
                [ 8, 0, 16, 8, "up" ],
                [ 0, 0, 8, 2, "north" ],
                [ 0, 0, 8, 2, "south" ],
                [ 0, 0, 8, 2, "west" ],
                [ 0, 0, 8, 2, "east" ]
            ],
            "cull": [ false, false, false, false, false, false ]
        },
        {
            "__comment": "lower body",
            "type": "cube",
            "from": [ 0, 0, 0 ],
            "to": [ 16, 4, 16 ],
            "shade": [ 0.5, 1.0, 0.8, 0.8, 0.6, 0.6 ],
            "uv": [
                [ 8, 8, 16, 16, "down" ],
                [ 8, 8, 16, 16, "up" ],
                [ 0, 6, 8, 8, "north" ],
                [ 0, 6, 8, 8, "south" ],
                [ 0, 6, 8, 8, "west" ],
                [ 0, 6, 8, 8, "east" ]
            ],
            "cull": [ false, false, false, false, false, false ]
        },
        {   "type": "plane",
            "from": [ 0, 0, 8 ],
            "to": [ 16, 16, 8 ],
            "uv": [ 0, 8, 8, 16, "down" ],
            "facing": "south",
            "rotation": [ 0, 45, 0 ],
            "cull": false
        },
        {   "type": "plane",
            "from": [ 0, 0, 8 ],
            "to": [ 16, 16, 8 ],
            "uv": [ 0, 8, 8, 16, "down" ],
            "facing": "north",
            "rotation": [ 0, 45, 0 ],
            "cull": false
        },
        {   "type": "plane",
            "from": [ 8, 0, 0 ],
            "to": [ 8, 16, 16 ],
            "uv": [ 0, 8, 8, 16, "down" ],
            "facing": "east",
            "rotation": [ 0, 45, 0 ],
            "cull": false
        },
        {   "type": "plane",
            "from": [ 8, 0, 0 ],
            "to": [ 8, 16, 16 ],
            "uv": [ 0, 8, 8, 16, "down" ],
            "facing": "west",
            "rotation": [ 0, 45, 0 ],
            "cull": false
        }
    ]
}

KnightMiner 2014-03-04T22:14:23Z

The reason for the halfway points it a bit of a cheat to include more texture space

KnightMiner 2014-03-04T22:52:16Z

I don't think it's the model, here is the default slime block model with a solid texture.

KnightMiner 2014-03-06T20:48:14Z

Uploaded new version of the debug pack using just a solid texture. Bug still present.

KnightMiner 2014-03-08T03:39:42Z

Figured out the certain locations for transparent blocks rendering in the wrong order (the non-plains thing), vertical chunk borders, or every 16 blocks

KnightMiner 2014-07-23T14:11:06Z

The semi-transparent blocks no longer render oddly on vertical chunk borders, it seems the new chunk threading fixed that. The other two issues are still relevant though

KnightMiner 2015-02-17T14:54:19Z

It seems this is a duplicate of MC-44373, though that issue only lists two of the three issues (one of which is fixed as far as I can tell) and has note been updated since 1.8 release.

kumasasa 2015-02-18T06:38:12Z

Resolved as Duplicate of MC-44373 (that one has more duplicates), but made you the reporter of that ticket.

Ercerus 2016-05-22T21:44:31Z

Still there in 16w20a.

KnightMiner 2016-05-28T23:29:01Z

This issue has been resolved as a duplicate, so head over there for confirming it still exists.