I have made a village by converting zombie villagers to normal villagers, they live in a walled city 4 high whit cobblestone (some places obsidian is placed instead of cobblestone), and a row of netherack on top (on fire), inside there are plenty of houses, and all the area is well lit, even inside houses are lit.
Earlier I have sometimes found 1 of the villagers turned zombie in their house, today, I suddenly found that the whole village had turned zombie. No breaches of wall, Iron doors where closed, metal Doors on outer walls are lever or button operated. (doors in houses are wooden and "normal").
It is rather annoying to have your nice sealed safe village suddenly a zombie outpost.
I have not read anything about converted/healed villager reverting to zombie, so I hope this is a bug and that it can be fixed/prevented from happening again.
It should be light enough, as its above ground, second, there are on the wall around city a torch every 4th square, there are torches on each wall of the houses, and two torches inside each house. (houses got 5x5 floorspace). No normal zombies have been found in the village, no other mobs have been found inside, only that the cured villagers suddenly where all zombies again.
*edit* There are also torches on the roof of buildings. */edit*
I was just about to say that. Your light level for the block needs to be 8 or above; if any block hits 7 a hostile can spawn.
If you use Forge you can try this mod out. It is LightLevelOverlay and it will highlight dark areas. The forum topic is here but you need to go to last pages for the latest update; easier with the other link.
Lighting is clearly the issue here; you basically need the place lit up like a Christmas tree to prevent mobs from spawning; torches are really rather limited in how far they can light a place up. Effectively, light only travels up to 6 blocks from a torch along the x/y/z axes before falling below 8 - and less along diagonals, forming the same pattern water does when flowing over a flat surface, so they need to be closer together or placed in a staggered arrangement, and every block up from the ground decreases the distance by one block.
Here's an example of torch placement that minimizes the number of torches required (this also applies to glowstone placed in the ground, which is equivalent to a torch placed on the same block; the higher light level is really no better since it is only 15 inside the block, 14 right next to it, same as a torch in that space):
Be aware that this only applies to level ground; any unevenness or obstructions like buildings will reduce the spacing. I usually use a smaller spacing in my main bases for more even lighting or just spam torches when lighting up a village and appearance isn't so important. Note also that for naturally generated NPC villages the 1-2 torches in some of the houses are inadequate unless they are the small huts; torches placed off the ground are also less effective.
Here's examples of effective lighting:
Based on the screenshots zombie sieges are not an issue since to get the 20 villagers required you need more than 57 doors (0.35 x doors = number of villagers), which would require multiple doors per house (pretty much any natural village is safe, except perhaps some Superflat villages).
Also, I'd advise replacing the wheat with carrots or potatoes since there are issues with the villager's inventories getting clogged up with seeds and/or bread and wheat due to the three different items involved and not being used at the same rates as they accumulate (carrots and potatoes are both seeds and food so there is no issue); I'm assuming you are playing in 1.8.
Thank you TheMasterCaverfor a decent and thourough guide on lighting.
I am just a bit more worried why each villager turned into a zombie villager, each in their own house, each alone and no mobs outside (or inside houses). as I play on normal, if there was zombies that had spawned inside, there would only be 50% conversion rate, so statistically I should have lost atleast a couple of villagers.
I had also spent the night it happened running around outside the village hunting zombies standing outside the wall, looking for more zombie villagers to cure. Hmm, maybe I should look for a pumpkin and make a golem for the villagers safty?
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I have made a village by converting zombie villagers to normal villagers, they live in a walled city 4 high whit cobblestone (some places obsidian is placed instead of cobblestone), and a row of netherack on top (on fire), inside there are plenty of houses, and all the area is well lit, even inside houses are lit.
Earlier I have sometimes found 1 of the villagers turned zombie in their house, today, I suddenly found that the whole village had turned zombie. No breaches of wall, Iron doors where closed, metal Doors on outer walls are lever or button operated. (doors in houses are wooden and "normal").
It is rather annoying to have your nice sealed safe village suddenly a zombie outpost.
I have not read anything about converted/healed villager reverting to zombie, so I hope this is a bug and that it can be fixed/prevented from happening again.
The light level needs to be at least 13 on every block for mobs not to spawn. You might want to check that. (Do not quote me on that though)
This is in Spanish when you are not looking.
There's no real way this could be a bug. As stated, you just need more lighting.
It should be light enough, as its above ground, second, there are on the wall around city a torch every 4th square, there are torches on each wall of the houses, and two torches inside each house. (houses got 5x5 floorspace). No normal zombies have been found in the village, no other mobs have been found inside, only that the cured villagers suddenly where all zombies again.
*edit* There are also torches on the roof of buildings. */edit*
*Edit 2* Added screenshots */edit*
*edit. sorry doublepost, please remove.
^Siege requires zombies to already be there
Alot of those areas look really dark. You need really serious torch spam to keep an entire area lit up.
I was just about to say that. Your light level for the block needs to be 8 or above; if any block hits 7 a hostile can spawn.
If you use Forge you can try this mod out. It is LightLevelOverlay and it will highlight dark areas. The forum topic is here but you need to go to last pages for the latest update; easier with the other link.
Lighting is clearly the issue here; you basically need the place lit up like a Christmas tree to prevent mobs from spawning; torches are really rather limited in how far they can light a place up. Effectively, light only travels up to 6 blocks from a torch along the x/y/z axes before falling below 8 - and less along diagonals, forming the same pattern water does when flowing over a flat surface, so they need to be closer together or placed in a staggered arrangement, and every block up from the ground decreases the distance by one block.
Here's an example of torch placement that minimizes the number of torches required (this also applies to glowstone placed in the ground, which is equivalent to a torch placed on the same block; the higher light level is really no better since it is only 15 inside the block, 14 right next to it, same as a torch in that space):
Be aware that this only applies to level ground; any unevenness or obstructions like buildings will reduce the spacing. I usually use a smaller spacing in my main bases for more even lighting or just spam torches when lighting up a village and appearance isn't so important. Note also that for naturally generated NPC villages the 1-2 torches in some of the houses are inadequate unless they are the small huts; torches placed off the ground are also less effective.
Here's examples of effective lighting:
Based on the screenshots zombie sieges are not an issue since to get the 20 villagers required you need more than 57 doors (0.35 x doors = number of villagers), which would require multiple doors per house (pretty much any natural village is safe, except perhaps some Superflat villages).
Also, I'd advise replacing the wheat with carrots or potatoes since there are issues with the villager's inventories getting clogged up with seeds and/or bread and wheat due to the three different items involved and not being used at the same rates as they accumulate (carrots and potatoes are both seeds and food so there is no issue); I'm assuming you are playing in 1.8.
TheMasterCaver's First World - possibly the most caved-out world in Minecraft history - includes world download.
TheMasterCaver's World - my own version of Minecraft largely based on my views of how the game should have evolved since 1.6.4.
Why do I still play in 1.6.4?
Thank you TheMasterCaverfor a decent and thourough guide on lighting.
I am just a bit more worried why each villager turned into a zombie villager, each in their own house, each alone and no mobs outside (or inside houses). as I play on normal, if there was zombies that had spawned inside, there would only be 50% conversion rate, so statistically I should have lost atleast a couple of villagers.
I had also spent the night it happened running around outside the village hunting zombies standing outside the wall, looking for more zombie villagers to cure. Hmm, maybe I should look for a pumpkin and make a golem for the villagers safty?