I feel like outlined ores are cheating, as you can see them in lava. which cannot be done in vanilla. As you can see in this photo you cannot see diamonds in the lava. I'd love to hear your thoughts
This was with my own mod's world generation but the results would be pretty similar for vanilla; the increase in exposed ores, including parts of a vein not directly exposed, was on the order of a few percent or less (in particular, the amount of diamond exposed increased by about 4.5%, or one extra ore for every 22 originally found; the total amount of ore exposed per chunk only increased by 0.65%). This is not surprising since the area around the edge of lava lakes that is potentially visible (but not from above) is quite small (I counted a vein as exposed if any block was adjacent to lava and there was air above the lava; otherwise, only direct air exposure was considered).
Also, even with the cave generation in my modded versions or vanilla 1.6.4 (they are much larger and denser than in newer versions) on average I only find about 4 diamond ore per hour, and 15 per play session out of a total of about 3000 ores mined (though I do not specifically seek out diamond, only unexplored caves, regardless of altitude), while it is possible to find a stack or more per hour with an efficient branch-mining strategy, which can average up to 1.7% of all mined blocks being diamond ore (about one every 59 blocks mined), far offsetting any potential advantages of being able to see ores otherwise hidden by lava - in fact, even if lava were entirely removed it would still only roughly double the amount of diamond exposed (many caves will go deep enough so the bottom is bedrock, which cannot be replaced with ore):
I doubt that this would ever be noticed by a server but you should always assume they will notice any suspicious activity (e.g. going directly to hidden ores, but usually this is done while using an x-ray texture pack which can show ores completely surrounded by solid blocks). You could also ask on the server's forum; for example, I found this on Hypixel, with a reply stating that it is okay to use:
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If a player really wants to know if a block is an ore and it's obscured, the F3 screen exists. Outlined ores are more of a player efficiency increase rather than anything else.
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Minecrafter since 2013.
Long-Term World 1 March 22nd, 2013 – 2016; Minecraft: Pocket Edition 0.6.1 – 0.15.7 Long-Term World 2 2018 – 2019; Minecraft for Windows 10 1.2.11 – 1.12.0 Long-Term World 3 February 15th, 2020 – Present, keeping this world for as long as possible; Minecraft: Java Edition 1.6.4 – 1.20.1
I feel like outlined ores are cheating, as you can see them in lava. which cannot be done in vanilla. As you can see in this photo you cannot see diamonds in the lava. I'd love to hear your thoughts
The impact is pretty minimal:
This was with my own mod's world generation but the results would be pretty similar for vanilla; the increase in exposed ores, including parts of a vein not directly exposed, was on the order of a few percent or less (in particular, the amount of diamond exposed increased by about 4.5%, or one extra ore for every 22 originally found; the total amount of ore exposed per chunk only increased by 0.65%). This is not surprising since the area around the edge of lava lakes that is potentially visible (but not from above) is quite small (I counted a vein as exposed if any block was adjacent to lava and there was air above the lava; otherwise, only direct air exposure was considered).
Also, even with the cave generation in my modded versions or vanilla 1.6.4 (they are much larger and denser than in newer versions) on average I only find about 4 diamond ore per hour, and 15 per play session out of a total of about 3000 ores mined (though I do not specifically seek out diamond, only unexplored caves, regardless of altitude), while it is possible to find a stack or more per hour with an efficient branch-mining strategy, which can average up to 1.7% of all mined blocks being diamond ore (about one every 59 blocks mined), far offsetting any potential advantages of being able to see ores otherwise hidden by lava - in fact, even if lava were entirely removed it would still only roughly double the amount of diamond exposed (many caves will go deep enough so the bottom is bedrock, which cannot be replaced with ore):
https://minecraft.fandom.com/wiki/Tutorials/Mining#Efficiency_vs_Thoroughness
I doubt that this would ever be noticed by a server but you should always assume they will notice any suspicious activity (e.g. going directly to hidden ores, but usually this is done while using an x-ray texture pack which can show ores completely surrounded by solid blocks). You could also ask on the server's forum; for example, I found this on Hypixel, with a reply stating that it is okay to use:
https://hypixel.net/threads/my-texture-pack-has-outlined-ores-is-this-bannable.1532875/
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?
If a player really wants to know if a block is an ore and it's obscured, the F3 screen exists. Outlined ores are more of a player efficiency increase rather than anything else.
Minecrafter since 2013.
Long-Term World 1 March 22nd, 2013 – 2016; Minecraft: Pocket Edition 0.6.1 – 0.15.7
Long-Term World 2 2018 – 2019; Minecraft for Windows 10 1.2.11 – 1.12.0
Long-Term World 3 February 15th, 2020 – Present, keeping this world for as long as possible; Minecraft: Java Edition 1.6.4 – 1.20.1