Lighting glitches in the over-world after returning from the Nether and End

Very similar so i'm posting this here, because the following report has been resolved into here: MCPE-75289 

Elytra-flying into an overworld end portal causes the end to loose all natural lighting, only light sources illuminate.

This also happens to me when I load and unload chunks in the overworld. This is at least happening on android

Same thing happened to me but in the end and its very annoying becouse it takes forever to log out and back in(the only way to fix it in full survival no cheats)

I'd never been to the End (or Nether). But I'd died and when I returned to my Overworld underground base the torches were not casting any light. Placing a new torch fixed all of them.

Affected again in 1.16.0.63

For those still affected - could we please see a short video of the issue?

Yeah, i'm getting this issue on my pc alot on my survival world. its kinda annoying tbh. I havent figured out how to recreate it and had recorded a clip to upload here for you to see it but it was over the 10MB limit so that sucks. its 61MB. 

If you're on Windows 10, you can switch off full-screen mode in video settings and reduce the window size to minimum to record much longer clips. Also turn off sound in the video recording settings.

I still have this issue in my xbox one

Also happens when you go into the nether and back

Added a screenshot of this issue affecting me. Only the block with the light source is lit.

Não resolvido na 1.16.20.50

the first picture happened to me as well.

I only notice this when going through portals, I just fix it by placing a torch in the area and breaking it. I think in some cases its related to chunk borders but can't confirm

Could this be related to the bug where you retain overworld lighting by traveling to the end and getting in a bed at the same time?

also found when exiting the never and it will fix with a block update but will only fix the areas that are visible.

I have taken a screenshot showing what this bug looked like, it was very annoying.

I also found out that sometimes placing a torch restores the lighting, but destroying it can sometimes reproduce this glitch.

This happens almost every time I start my mincraft world even if I am never in the end

This has happened to me when returning from the nether but at other times I have found it after traveling to my guardian farm by minecart (this could be the chunk border issue as the farm likely spans several chunks).

Wrong bug. This bug is when the overworld lighting turns into end dimension lighting after leaving the end dimension. MCPE-58182 is what you are experiencing. The sudden cut off is MCPE-58182 due to it not passing though chunk borders.

This will also happen when leaving the nether, btw

That would be MCPE-58182. The random cut off is it not travelling through a chunk border. Unless there is only a torch being lit.

I've been doing a lot of work in the Nether lately, and I often return to the Overworld to access my storage room and before ending my day (I always save while in my bedroom, if I'm anywhere around my base), so I've seen these lighting bugs a lot: multiple times a day, in fact. I am not at all convinced that the division of these lighting issues into separate bugs is correct. The following screenshot, for example, shows blocks with no light spreading from light sources, light spread being cut off at chunk boundaries, and unusually dark but gradual shadows. That's all three of what's been divided into separate bugs, all in the same image.

For reference, here's a screenshot from the same position with a resource pack that highlights chunk boundaries in light green:

Those images and the following ones were all taken immediately after loading a world, then immediately going to the Nether and returning, several times. While going from my initial location to the portal, I crossed one chunk boundary. (As info, I didn't place or break any blocks, didn't change my inventory, didn't use any tools, and didn't see any hostile mobs,) I went to the Nether and returned three times in rapid succession, without moving around in the Overworld between trips.

This first shot is the view through my portal room window immediately after returning to the Overworld the first time:

This looks just like it did before I went to the Nether. (In my experience, it's normal for this bug not to leave any visual evidence until you return the second time.)

The second time I returned from the Nether, this is what I saw through the same window:

Notice that the chunk I'm standing in is fully dark, as is the one to its right. (This was a surprise, as it's almost always the chunk on the far side of the room and to the right that's dark.) At this time I removed a lot of the floor slabs to reveal how the room was supposed to have been lit. The subfloor holes that appear lit here contain torches:

I also took some shots of a space below this which shows a sharp light boundary looking back toward the portal direction:

and a gradual fade to shadow with no in-chunk light propagation in the opposite direction:

The third time I returned from the Nether, a different set of chunks were affected:

A few days ago, I took a day off from my Nether building to fix some lighting flaws that I'd let creep into in my Overworld base. This took me about an hour. I then made a quick trip to the Nether, and when I returned, the area outside my portal room was dark. This was unusual, because previously the lighting always looked normal the first time I returned from the Nether. I think this might indicate that it's not the number of times I go to the Nether, but rather the amount of time that has elapsed since loading the world.

In summary, I have observed the following symptoms:

• The lighting problems only become apparent when returning to the Overworld dimension.

• They usually do not appear the first time you return to the Overworld, but I think that's a result of me spending very little time in the Overworld before going to the Nether. It appears that the problems accumulate as you spend time in the world, but don't become evident until you return from the Nether.

• The chunks affected appear to be randomly selected from those within the simulation distance of the player.

• Lighting seems normal in any part of the world when you first go there, and usually the first time you arrive there from the Nether. However, each subsequent time you go to the Nether and return, there's a chance that some chunks within your simulation distance will be affected.

• The degree of light deficiency is variable. Sometimes it's too subtle to even notice.

• The effects are not merely visual. When the bug is triggered, mobs can spawn in areas that appear dark, even if they're right next to a light source.

• Reloading the world always fixes the problem.

I just now discovered another clue. The bug doesn't affect all faces of a block uniformly:

The same view after reloading the world:

Another view from backing away a bit. Note that slab top surfaces are black in multiple chunks. -Also, light glitches stop at chunk boundaries in the -X and Z directions, but fade normally in the +X and +Z directions.

I rarely experience this issue because of issue with Minecraft bedrock blowing up my graphics cards. But it does happen every time I go on it. I thought the sudden cutoff was MCPE-58182.

Affects 1.16.100.51

Happens everytime I come back through a nether portal random chunks are unlit.

8

I've been experimenting with this world. It hosts a flat 5 x 5 chunk area with each chunk's surface an alternating color to show where the chunk boundaries are. The area is lit with torches placed on the diamond grid associated with taxicab distances, so it achieves a minimum of light level 8 at every block in the area. This produces a regular pattern of light and shadow in which a lighting anomaly can easily be seen by its disturbance in the pattern. A Nether portal is built just outside the southwest corner of the area.

In my experiments I noted the following observations:

• The lighting issue can be triggered by going to the Nether and returning.

• The issue manifests as shown in the sample pictures below. It affects whole chunks, not individual light sources. In the affected chunks, torches light the block they're in but their light doesn't appear to propagate to other blocks. On the other hand, light from sources in unaffected chunks appears to propagate into the affected chunks.

• Which chunk(s) and how many are affected doesn't seem to correlate well with anything. They can vary from one use of the portal to the next. However, there may be a greater tendency for chunks near the portal to be affected.

• The issue occurs in Creative as well as Survival, in Single-player or in Multiplayer,

• Sometimes affected chunks are spontaneously corrected, either promptly upon returning to the Overworld or after a delay of perhaps 10 seconds. The corrections appear one chunk at a time. Corrections can occur in all affected chunks, a subset of them, or none, apparently at random.

• If you leave the Overworld by one portal and return by a different one, the erroneous chunks tend to occur near the portal you return through, not the one you left through.

• Closing and reloading the world recalculates (and thereby corrects) all the chunks.

• I was able to reproduce the issue with torches, end rods, and lanterns. Also with jack-o-lanterns, glowstone and sea lanterns, but with the difference that these full-size blocks didn't appear to illuminate their own blocks.

• The issue also occurs if you fly or teleport a substantial distance away in the Overworld, then return, but as far as I've seen the chunks are spontaneously corrected in this situation, so the persistently affected chunks may only occur in conjunction with changing dimensions.

• The churn of ticked chunks may have something to do with causing the problem. It would account for the apparent randomness, and it often seems like when I'm having trouble getting the issue to occur, flying around a bit (shifting my ticking area around) in either the Overworld or the Nether seems to help.

• The issue is not merely visual, the low light levels are real and allow monster spawns to occur where none should be possible.

Sample screenshots:

This can happen on servers that use the "Dimension Travel-style" transitions such as The Hive, Mineplex, or Galaxite.

It happens in my signal player world and on split screen.

Affects 1.16.200.55 Beta

It used to happen to me a lot, then in 1.16.40 Hotfix it stopped. It didn't happen again until just now. I made several trips through a portal in quick succession. On my last return to the overworld I walked down a narrow hallway and when I turned a corner I saw a shadowed section adjacent to a lantern. Unfortunately I didn't get a shot of that one, but I know the shadow's edge was at (20, 31), at the southern edge of a chunk.

Continuing a few more steps, I saw a second lighting anomaly. A place that normally looks like the first picture had a dark shadow, as shown in the second picture:

This time the shadow was not only on the southern edge of the next chunk, its darkest block was at the southeast corner of the chunk, at coordinates (15, 15). (These images are from a flat Creative design world.)

Immediately after snapping those two screenshots, I looked to the right and noticed through a door that a Wandering Trader had spawned in the chunk adjacent to the second lighting glitch, which is the same chunk the first shadow was in. I got a screenshot of it:

It could be just a coincidence, but I can't help wondering whether spawning logic runs as you enter a dimension, and if so whether it might have something to do with this problem.

As a general observation, this manifestation of the bug "feels" different to me than the original one I reported on above. At least in this instance, only areas of a few blocks' extent seem to be affected now.

This is still happening in Minecraft Bedrock Android's latest version (1.16.221). You don't even need to travel to other dimensions, although the issue is much more common if you do so. I was wandering around in the overworld, on non-flat survival mode, and when I went back to my base, dark spots can happen. By breaking and replacing my lanterns, the lighting issue is fixed. Restarting the game also helps. But it's rather dangerous though, as hostile mobs may spawn. The base is quite large with many light sources and whatnot.

Still happens sometimes on 1.17 Android, even if you don't go into other dimensions. The lighting issue is not always as abrupt as the above screenshots. Sometimes, spots can appear darker than usual even though there's a lantern above. It's almost as if the lantern isn't working. And it seems that it happens more often on specific spots of the base, areas that don't have direct access to sunlight.

Happens on 1.17.10 as well. I was on creative mode, lighting up a bunch of caves in a world. As I go back and forth, I noticed some unusually dark spots here and there, even though I've placed a lantern/torch there already. I didn't go to other dimensions, I'm simply going back and forth in the overworld, lighting up caves with hundreds of lanterns and torches.

Happening since upgrade BDS to 1.19.30.04. This update includes several other bugs as well. What a shame.

This happens more when i just log into the game. I get black patches if i go to it and break a block within the patch it goes away. Now if there is a torch or light source within it the light only lights up the block it is on, if I break the lighting source the black patch goes away. If i log out of the game and come back in then the patches aren't there but if I fly a little bit down from where they were then they show up on another part of the world.

@unknown: Are you saying that once you've corrected the problem in a given chunk, it works properly even after reloading the world? If so, it sounds like the problem that caused the issue is fixed but you still have a world that was saved in its damaged form. I think you can fix it, but I'm afraid you'll probably have to fix it one chunk at a time, by causing the lighting in that chunk to be recalculated. The easiest safe way to do that is to temporarily place a torch near the dark area and break it, or to break and replace a light source as you've been doing. If your world is large, I would suggest just doing the fixing as you encounter lighting problems rather than trying to fix everything in a single session.

I'm not sure, but I think it's likely that the game will treat the dark areas as if they're genuinely dark, which would mean hostile mobs might spawn in the darkest spots. If you're worried about that, you might want to switch to peaceful mode while fixing some chunks. Be careful, though: Switching to peaceful will despawn all hostile mobs within your simulation distance, so if you're keeping a hostile mob imprisoned somewhere you'll want to be sure it's persistent, or that you're far enough away when you switch.

@unknown: Does your issue happen in any newer worlds or only worlds that are a year old or older? You might be having the same problem as aiy1021 (see my earlier comment).

All: I haven't had this problem since 1.16. It was supposed to have been fixed in a 1.16 Beta release, so it should have been fixed in the retail version 1.16 but this report wasn't resolved, probably because it was accidentally omitted from the changelog. I'm going to ask Mojang to check the status. If they say it was fixed, I intend to close this report, unless anybody responds to say it's happening in new worlds.

If you comment to say it's happening, please tell us:

• What release your world was created in, as close as you can remember

• Whether placing a torch fixes the problem for the chunk it's in

• Whether the problem happens in new chunks, or happens again in chunks you fixed by placing a torch.