[MC-138211] Smooth lighting / ambient occlusion is incorrect (asymmetrical) on south-east and north-west corners

Currently affects all versions of Minecraft & makes gameplay awful!

The bug

Incorrect AO in the bottom left and top right corners (in the image) due to anisotropy.

[media]

Possible fix

Flip quads with incorrect AO or use custom interpolation on a quad.

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[media][media]

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Linked issues

is duplicated by 1

MC-136302 Ambient Occlusion shadows at corners are not the same. Resolved

relates to 3

MC-194624 The edge of light sources can be subtly blocky in certain directions Reopened

MC-148689 Smooth lighting / block shading does not work properly in certain cases Open

MC-80501 Smooth lighting is asymmetric Resolved

Attachments

Comments 23

[Mod] Neko 2018-10-27T21:48:22Z

Does MC-136302 describe your issue?

[Bot] Arisa 2018-10-31T17:19:06Z

Please do not mark unreleased versions as affected.
You don't have access to them yet.

Charlie 2018-11-01T14:04:23Z

Can confirm

[Bot] Arisa 2018-12-11T13:45:45Z

Please do not mark unreleased versions as affected.
You don't have access to them yet.

violine1101 2019-06-12T12:13:56Z

@unknown, don't try to change "Mojang Priority". It may only be changed by the developers. Consider this a warning.

13 more comments

muzikbike 2019-07-10T19:06:08Z

Affects 1.14.4pre4

[Bot] Arisa 2019-08-03T17:05:54Z

Please do not mark unreleased versions as affected.
You don't have access to them yet.

[Bot] Arisa 2019-09-18T12:21:13Z

Please do not mark unreleased versions as affected.
You don't have access to them yet.

muzikbike 2020-02-29T00:25:15Z

I can't tell if this affects Beta 1.8 or not, wanted to see if this was a new iaaue or whether it's been here since the introduction of smooth lighting.

Iosiv Visokogorskiy 2020-06-14T11:54:05Z

Can you reproduce this bug in 1.16 pre release 5?

GishCraft 2020-06-14T15:25:14Z

Yes, I can.

Arisa Bot 2020-06-22T15:27:32Z

⚠️ Please do not mark Unreleased Versions as affected. You don't have access to them yet.

We have removed it and added the latest released version

Please edit the Affects Version/s field and select the specific Released Version you were using when you encountered the reported issue.

If you can't find it in the list, please make sure that:

You are in the correct project on the bug tracker.
You were playing the latest release version or the latest development version of the game.

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muzikbike 2020-07-12T12:41:59Z

If a bug upon its introduction with lighting ice is anything to go by, this bug goes as far back as Beta 1.3...

anthony cicinelli 2020-09-01T21:36:22Z

Mateus Pereira Milbradt don't pretend to be a bot

Jukitsu 2021-05-21T14:06:21Z

[media]

I've been able to screenshot this on a old version of Minecraft (beta 1.7.3) so it would be safe to assume this bug has been here since Beta 1.3...

GishCraft 2021-05-21T19:02:26Z

It's outrageous to realize that this bug has been here since Beta. If you're a programmer you can tell that Minecraft's source code is so f*cked up. As a developer, I would have no interest in fixing such sh*t, but there is a guy who works on these rendering bugs and it seems he doesn't care about improving Minecraft's visuals!

Toru the Red Fox 2021-09-11T11:59:27Z

simply not converting quads to tris at the tessellation stage fixes the problem

Toru the Red Fox 2021-09-11T12:03:13Z

This is me using quads with my smooth lighting port to Alpha v1.2.6:

[media]

Therefore, there's no need for any custom interpolators as the GPU can handle it on its own just fine.

Toru the Red Fox 2021-09-20T20:23:49Z

oh and @MotanGish, they have better things to be doing than fixing issues caused by janky interpolation done on triangles by practically every GPU in existence

ampolive 2021-10-07T22:29:42Z

Can confirm in 21w40a.

muzikbike 2022-03-17T12:51:19Z

Can the title of this ticket be changed to clarify that the issue concerns asymmetry?

ampolive 2022-03-17T12:54:26Z

Done.

Jukitsu 2024-04-12T14:23:09Z

@TorutheRedFox Unfortunately, quads are deprecated in OpenGL 3.2, so this is not a viable solution anymore.

(I know it's been 3 years but I thought i'd clarify this)