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MC-94487

Ravines don't naturally cut through sand, sandstone, or terracotta upon generation, but other cave types do.

The bug

In 14w20a, Mojang added caves naturally cutting through sandstone, sand, hardened clay and mycelium upon generation (see https://twitter.com/dinnerbone/status/466887474367954944).

However, this new feature did not extend to the cave generation that spawn ravines, so you still get unnatural-looking formations where the ravine cuts into grass but not other blocks (see image attachment). This is why you never see surface ravines in desert, mushroom or mesa-type biomes.

How to reproduce

Sand and sandstone

Seed: 1
/tp 197 62 -4 70 24

Linked issues

Attachments

Comments

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Please provide seed and coordinates.

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Here, you can use Seed 1, and just fly a flew hundred blocks north of spawn. Image attached.

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Please confirm?

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I provided screenshots to show that ravines don't naturally cut through hardened clay or mycelium. I used a customised world to prove the mycelium, details in the screenshot.

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

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TL;DR: Fixed in 18w08a.

In 18w08a, ravines changed. They don't generate where they did in previous versions (using the same seeds and locations), so I had to find new surface-ravines or would-be surface-ravines to see what they cut into.

Sand & Sandstone:
Ravines now cut through these. Seed: 1
Location: /tp @s -10360 75 39780

Red Sand & Terracotta:
Ravines now cut through these. Seed: -635205980
Location: /tp @s -805 70 -188

Mycelium/Snow Blocks:
Can't find surface ravines or would-be surface ravines in these biomes. Much harder now that we can't use Customised Worlds to generate a world of just that biome. But even if they don't cut through those, MC-16132 exists for that.

Conclusion: Fixed in 18w08a.

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Confirmed

cave, desert, mesa, mushroom-island, mycelium, ravine, sand, sandstone, terracotta, world-generation

Minecraft 1.8.9, Minecraft 15w51b, Minecraft 16w05b, Minecraft 16w06a, Minecraft 1.9 Pre-Release 4, ..., Minecraft 18w02a, Minecraft 18w03b, Minecraft 18w05a, Minecraft 18w06a, Minecraft 18w07c

Minecraft 18w08a

Retrieved