[MC-300153] The inner cubes of slimes are sometimes invisible from the outside

Sometimes, the faces of slimes do not render from the outside. If you clip inside them, they’re still there, just invisible from outside. Reloading fixes it, but the bug seems to reappear at random. This seems to be related to MC-300267.

Linked issues

is duplicated by 6

MC-300171 Slimes have lost their eyes Resolved

MC-300256 Faceless slimes Resolved

MC-300284 Is normal? slimes do not have faces Resolved

MC-300310 Slime texture is not displayed correctly Resolved

MC-300363 Slime Rendering Resolved

1 more links

Attachments

image (722bffb1-c7db-4e31-90f8-71581717d4fc).webp

image (d67fccb4-d09f-494a-afdb-d37655940910).webp

Comments 21

[MOD] Greymagic27 2025-07-29T17:20:53Z

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They appear to have faces for me.

Please attach a screenshot of this occurring while the F3 debug screen is enabled.

This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
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Cypress W 2025-07-29T17:21:58Z

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Cypress W 2025-07-29T17:23:25Z

oh hol up i didn’t see the response lemme get a better screenshot

Cypress W 2025-07-29T17:24:35Z

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Cypress W 2025-07-29T17:26:44Z

I just opened a creative world, and this bug was not present. It may be related to specifically slimes spawned from trial spawners.

11 more comments

Cypress W 2025-07-29T17:31:51Z

Strangely, I cannot seem to recreate this in creative mod with manually placed monster spawners or trial spawners. The survival world in which i encountered this bug was originally created in, I believe, 25w21a.

Cypress W 2025-07-29T17:35:15Z

I found a slime spawner trial chamber in a new creative world, and this bug is not present. I cannot figure why this is possibly happening in my survival world.

Cypress W 2025-07-29T17:37:36Z

Okay, this is bizarre. They spawned with faces, I made that comment, went back, and they lost their faces. I feel like I’m going insane.

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[MOD] Greymagic27 2025-07-29T17:41:44Z

Thanks for the extended testing. on this. I can see someone else was able to confirm it so it may be that it only occurs in very specific cases. If we can narrow that down though that’d be awesome. Ideally some solid reproduction steps

Cypress W 2025-07-29T17:44:07Z

I’ll try to further identify what is going on here, but it seems pretty inconsistent so far. As a side note, the entity models inside trial spawners seem to be rendering off-color, I need to check if that’s a known issue as well…

Cypress W 2025-07-29T17:47:15Z

Running /reload seemed to give them their faces back.

Cypress W 2025-07-29T17:50:37Z

It seems that logging back into a world also resets their faces.

Cypress W 2025-07-29T18:03:32Z

Here’s an example of the miscolored spawner, if you look closely, the slime inside it is blue. This only seems to occur at the same time that the slimes lose their faces. I was flying around trying to recreate this bug, and no clear action I took triggered this. The only thing I did was fly back into the area, but I had already tested loading and unloading the chunks and it had no bearing on the glitch.

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Cypress W 2025-07-29T18:04:44Z

Here’s a close-up of the miscolored slime.

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Cypress W 2025-07-29T18:07:37Z

It gets weirder. The eyes on the slime inside the spawner render from the INSIDE as I clip into it in spectator. This remains true for the regular slimes as well. So it’s just that you can’t see the eyes from the outside. lmao

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Cypress W 2025-07-29T18:08:25Z

Magma cubes are fine.

Cypress W 2025-07-29T18:12:03Z

I should add that the miscoloration of the mob inside spawners applies not just to slimes, but any mob. Spawners, trial spawners, and ominous trial spawners are all affected.

Cypress W 2025-07-29T18:34:14Z

I tried /reload again and this time it didn’t work. This bug seems really inconsistent.

Calico Walker 2025-07-30T00:53:15Z

Can confirm.

For me, the bug only seems to reset after relaunching the game (reloading the chunks, /reload, reloading textures, and reloading the world all did not work). When exactly the bug happens seems arbitrary: it happened 22/40 times I launched the game, with no discernible pattern.

Other observations:

The bug seems to only happen with slimes, and not allays (which also contain translucent pixels).
The bug seems to only make the opaque layers of the slime invisible when viewed through the translucent outer layer. This can be confirmed by using a resource pack to make part of the outer layer fully transparent (The inner parts are visible through the transparent pixels, but not the translucent ones).
The per-pixel translucency from the Fabulous! graphics setting has no effect on the bug.

Additionally, the spawner bug seems to be a separate issue from the slime bug, as I’ve had both bugs occur independently of each other.

MrMuskle 2025-07-30T03:18:52Z

@Calico Walker Thank you for sharing this additional piece of information. As a consequence, I have split the issue regarding spawners into a separate report: MC-300267

Håkan Wallin 2025-07-31T12:52:44Z

Thanks for the information gathered so far on this issue!

If anyone have further information on context and/or triggers on where/when this occurs it would be very helpful in further investigation.