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WORLD DOWNLOADS (see below) First example of Y-under-14 hyper-efficient mob farm. (why Y-under-14? watch the video for explanation). This is a fifth episode in my series - 'Fun Farms', where I am taking one mob at a time and showing unique farms based around some interesting game mechanics. Ultra-efficient, Passive (Peaceful) Mob farm. 2000 Animals (180 Horses) for 5000 Spawning Spaces / hour but you can scale it up as long as your computer (server) is OK with it. Needs a little bit of TNT (I used 2 double chests in my world), otherwise, pretty cheap to build too. I guess as server friendly as flush based mob farm can ever be, but with 5000 spawning spaces I didn't encounter any dropped ticks (unlike with my previous 37k spaces design). CPU was spiking from 3% to 8% on the server (Vanilla 1.8.8) (max 12%, (8 core machine)) when the water was flushing (AMD old cheap-o processor). 1.9 Snapshots server had less luck (spikes up to max 12%, but no dropped ticks either). Should be better once the production 1.9 comes out. Preferable client: Optifine with water animations turns off (barely noticeable frame drops). Vanilla 1.8 client (no ability of turning water animations off) - significant frames dropped (up to 10FPS at occasion). Vanilla snapshot 1.9 client: no comments (1-2 fps). However - client performance doesn't affect server performance, so that's ok. Looking up into the sky while the farm is running fixes the issue. +Extra analysis of changes in natural spawning in Minecraft 1.8.8 based on MCP code base (MCP 9.18) (comparing to previous versions of Minecraft). It seems from the experiments, that it didn't change so far in 1.9. Modeling world to simulate mob spawning written in Python, rewritten from Java (MCP). In Comparison with: Cheapest and Easiest passive mob farm (300 animals / 37 000 spawning spaces / h): https://www.youtube.com/watch?v=E40UnXCZFIA ZipKrowd MushroomCow Farm (4000 animals/ 100 000 spawning spaces) (they reported 11500 drops, but cows on average drop 3 items (one leather and 2 beef)) https://www.youtube.com/watch?v=9hNG_7TBCIM Timelapses using Replay Mod. References: World Downloads: Horse test farm: http://bit.ly/1QIZwvq Meat Market test world: http://bit.ly/1Q5QDbR Meat Market deserted island world: http://bit.ly/1KOV7Vk Simulation Script: http://bit.ly/1Qo3hRp (I don't know why anybody would need that, but just in case) JL2579. ZipKrowd Mushroom Cow Farm 4000 cows / 100.000 spawning spaces (avg 3 drops / animal) https://www.youtube.com/watch?v=9hNG_7TBCIM JL2579. Efficient Mob Spawning (Minecraft 1.3): https://www.youtube.com/watch?v=YzNY3ZgFD9g KaboPC. Spawning Facts (Minecraft 1.3): https://www.youtube.com/watch?v=7-8u6Phxv6E Ilmango Efficient Mushroom farm: https://www.youtube.com/watch?v=2jiFZhDshlY https://www.youtube.com/watch?v=Pf5T8L0AsjA ---------- Minecraft IGN: gnembon Find me on Twitter: http://twitter.com/gnembon_mc Resource Pack: Minecraft HD 64 http://www.minecraftforum.net/forums/mapping-and-modding/resource-packs/2209477 -minecraft-hd-64x-5-17-fixes (With modified bedrock texture, clean glass, also modified by me to work with 1.9) Timelapses using Replay Mod. Music used: - Holberg Suite https://musopen.org/music/2658/edvard-grieg/holberg-suite-op-40-string-orchestra-arr/ - Mozart - Dies Irae from the Requiem