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{{for|development history of this version|Cave game tech test/Development}}
{{unreleased}}
{{Infobox version
|title=Cave Game
|image=Cave game tech test.png
|name=Cave game tech test<ref name=video/><br>
Cave Game tech demo<ref name="tech demo">{{citation|url=https://web.archive.org/web/20210509000309/https://notch.tumblr.com/post/107315028/cave-game-tech-demo|title=Cave Game tech demo!|website=[[Minecraft:The Word of Notch]]|date=May 13, 2009}}</ref>
|edition=Java
|phase=pre-Classic
|date=May 13, 2009
|unreleased=true
|clientdl=Client not archived
|prefix=pre-Classic
|next=rd-132211
|no_protocol=1
|no_data=1
|no_java=1
}}

'''''Cave game tech test''''' <ref name="video">{{ytl|F9t3FREAZ-k|Cave game tech test|([{{ytl|UMpv5kZ9-rE}} Archive]) Nizzotch|May 13, 2009}}</ref> or '''''Cave Game tech demo'''''<ref name="tech demo" /> is the earliest publicized unreleased version of what would become ''[[Minecraft:Minecraft]]''. It was made on May 13, 2009, between roughly 16:48<ref name="log">{{cite|url=https://web.archive.org/web/20140208190915/https://echelog.com/logs/browse/lwjgl/1242165600|title=lwjgl IRC logs|website=Echelog|date=May 13, 2009 (UTC+2)|quote=[18:48:38] <Notch_> I managed to force it to do as I want now. 72 fps, 288 chunk updates per second}}</ref> and 16:55 UTC.<ref name="8x8" /> This version was never released. A video of the game at this time was recorded by [[Minecraft:Notch]] sometime between 17:00 and 17:14 UTC, and uploaded at 17:36 on May 13.<ref>[[#lwjgl logs|LWJGL IRC Logs]]: "''[19:00:52] <Notch_> hmm, I wonder if I could make a vid of this''" [...] "''[19:14:02] <Notch_> haha, the video ended up at 1.05 GB''" [...] "''[19:15:36] <Notch_> well, this is annoying. I guess I have to recapture. Google has a limit of 2 gb''" [...] "''[19:36:42] <Notch_> upload complete, processing video''" [...] "''[19:50:18] <Notch_> ok, the quality is still crap until the processing finishes, but: http://www.youtube.com/watch?v=F9t3FREAZ-k''" </ref> It is the earliest known version of ''Minecraft'', or what was then known as ''Cave Game'', to have been recorded.

[[Minecraft:/Development|Development of the game]] started around May 10<ref>{{cite|url=http://www.minecraft.net/about.jsp|title=About the game|website=Minecraft|date=June 2009|archive-url=http://web.archive.org/web/20090615065538/http://www.minecraft.net/about.jsp}}</ref> or 11<ref name="11th">[https://archive.org/download/Rotab-Minecraft-IRC-logs Rotab's IRC logs] on Archive.org; #minecraft.20090525.log. May 25, 2009 (UTC+2). "''(10:40:09) <@Notch> heh, the game game tech test video is from the 13'th''"[...]"''(10:40:18) <@Notch> that was after two days of work, so I started the 11'th, probably''"</ref> to May 12 at the latest,<ref>[[#lwjgl logs|LWJGL IRC Logs]] "''[13:34:09] <Notch> i was trying to narrow down a performance issue last night.''"</ref> and continued up to May 13, 2009, adding the features that would be later seen in the [[#Videos|''Cave game tech test'' video]].

== Features ==
{{Additions table
|title= Cave game tech test
|Air
|Grass Block
|Stone
}}

=== Blocks ===
'''[[File:Blank.png|32px]] [[Minecraft:Air]]'''
* Not listed as a block at this time.

'''[[File:Grass Block JE1.png|32px]] [[Minecraft:Grass block]]'''
* Made with the same graphics from Notch's game ''[[Minecraft:RubyDung]]''.
* Grass appears on fully lit tiles on the top 7 layers of the map.
* Had the same texture on all sides of the block.

'''[[File:Stone JE1.png|32px]] [[Minecraft:Stone|Rock]]'''
* Made with the same graphics from Notch's game ''RubyDung''.
* Its texture at this time would later be repurposed for [[Minecraft:cobblestone]].

=== Non-mob entities ===
'''[[Minecraft:Player]]'''
* Currently has no model.
* Has a height of 1.7 blocks.

=== World generation ===
'''[[Minecraft:Cave]]s'''
* Pass from the uppermost layer of the grass block to the penultimate layer of stone.

'''[[Minecraft:Chunk]]s'''
* Takes about 0.1 seconds to generate.<ref>[[#lwjgl logs|LWJGL IRC logs]] "''[13:37:42] <Notch> rebuilding a chunk of these takes almost 100 ms, but that's everything, including tesselation, calculating lighting, and building the display list.''"</ref>
* The size of each chunk is 16×16 blocks.<ref>[[#lwjgl logs|LWJGL IRC logs]] "''[13:37:08] <Notch> I've got chunks of blocks, 16x16x16 blocks. Each block can have a maximum of three quads, but that's worst case scenario''"</ref>
** Chunks are 16×16 blocks instead of 8×8 because 8×8 chunks decreased performance.<ref name="8x8">[[#lwjgl logs|LWJGL IRC logs]]: "''[18:55:45] <Notch_> the chunk size is 16x16 now..''" [...] "''[18:56:47] <Notch_> 8x8 chunks are SLOWER''"</ref>
* Chunks are loaded in order of their proximity to the player.<ref>[[#lwjgl logs|LWJGL IRC logs]]: "''[19:51:48] <Notch_> i'll update tiles chunks the player first, and force a full update upon game start''"</ref>
* The player spawns in a 256×64×256 tile map.
** The game takes 20 seconds to generate a 256×64×256 map.<ref>[[#lwjgl logs|LWJGL IRC logs]]: "''[20:02:58] <Notch_> it takes like 20 seconds to grow a 256*256*64 map, though. :-\''"</ref>
* It was possible to fall out of the world, but it would not kill the player.

=== Gameplay ===
'''[[Minecraft:Controls]]'''
* WASD key use for movement.
* Space key for jumping.
* Moving the mouse moves the camera.
* Can’t break or place blocks.
* Holding down {{key|R}} causes the player to respawn in a random X and Z coordinate at Y=74 every game tick (which is 1/60th of a second long prior to [[Minecraft:Java Edition pre-Classic rd-160052|rd-160052]]) until the key is released.
** If the player falls into the void, they fall infinitely unless they press {{key|R}}.

=== General ===
'''[[Minecraft:Light]]'''
* The lighting engine in [[Minecraft:Java Edition Classic|Classic]] and [[Minecraft:pre-Classic]] was simple, with only 2 light levels, bright and dark.
** "Sunlight" is emitted by the top edge of the map and hits any block that is under it, regardless of distance. It passes through transparent blocks to light blocks underneath.
** Blocks that do not receive light are in a dim shadow that remains at the same level of brightness no matter how far they are from a light source.
** Blocks which are darkened also have a layer of thick, black fog applied to them, appearing darker when looked at from further distances.{{verify|type=change|How is the light level 'dark' prior to Indev has the luminance value of?}} This caused weird visual glitches.

== Videos ==
'''Original'''
{{video note|All videos from [[Minecraft:Nizzotch]], [[Minecraft:Notch]]'s [[Minecraft:YouTube]] channel, have been globally region-locked. Region-free archives of most videos are available.|nocat}}
{{yt|F9t3FREAZ-k}}
'''Archive'''
{{yt|UMpv5kZ9-rE}}

== Gallery ==
<gallery>
File:A cave.png|A cave
File:Cave Game chunk loading.png|The chunks were loaded slow in this version
File:Cave Game falling.png|The bottom stone layers in this version
File:Cave Game R pressed.png|The ground in this version
File:How it Started.jpg|A pit, with a contrast of light and dark on the left and right to illustrate the simplicity of the lighting engine at this version.
</gallery>

== References ==
* {{anchor|lwjgl logs}} {{cite|url=https://web.archive.org/web/20140208190915/http://echelog.com/logs/browse/lwjgl/1242165600|title=lwjgl IRC logs|website=Echelog|date=May 13, 2009 (UTC+2)}}
* {{anchor|irc logs}} [https://archive.org/download/Rotab-Minecraft-IRC-logs Rotab's IRC logs] on Archive.org; #minecraft.20090525.log. May 25, 2009 (UTC+2)
{{reflist}}

== Navigation ==
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Minecraft:Cave game tech test - Revision history

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