Greenscreen

This changes the glowstone texture to a 1x1 image with the color #00ff00 and more. This is great for things like transparent images from Minecraft, and you can also make a video overlay of yourself or other things.

Quick tip:

If you want to place a stage quickly, you can follow these instructions for 1.21.1:

1. Replace the block under you with the desired color screen.
2. Place an impulse command block on it.
3. Paste the following command into the command block and run it:

/summon minecraft:falling_block ~ ~1 ~ {BlockState:{Name:"minecraft:redstone_block"},Passengers:[{id:"minecraft:falling_block",BlockState:{Name:"minecraft:activator_rail"},Passengers:[{id:"minecraft:command_block_minecart",Command:"/execute if block ~ ~-3 ~ sea_lantern run fill ~-5 ~-3 ~1 ~5 ~4 ~10 sea_lantern",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/execute if block ~ ~-3 ~ glowstone run fill ~-5 ~-3 ~1 ~5 ~4 ~10 glowstone",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/execute if block ~ ~-3 ~ shroomlight run fill ~-5 ~-3 ~1 ~5 ~4 ~10 shroomlight",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/execute if block ~ ~-3 ~ ochre_froglight run fill ~-5 ~-3 ~1 ~5 ~4 ~10 ochre_froglight",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/execute if block ~ ~-3 ~ verdant_froglight run fill ~-5 ~-3 ~1 ~5 ~4 ~10 verdant_froglight",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/execute if block ~ ~-3 ~ pearlescent_froglight run fill ~-5 ~-3 ~1 ~5 ~4 ~10 pearlescent_froglight",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/execute if block ~ ~-3 ~ jack_o_lantern run fill ~-5 ~-3 ~1 ~5 ~4 ~10 jack_o_lantern",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/setblock ~ ~-3 ~ chiseled_stone_bricks",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"/fill ~-5 ~-2 ~1 ~5 ~4 ~9 air",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"setblock ~ ~2 ~ chain_command_block[facing=up]{Command:\"fill ~ ~-4 ~ ~ ~ ~ air\", auto:true}",CustomName:'"blk1"'},{id:"minecraft:command_block_minecart",Command:"setblock ~ ~1 ~ command_block[facing=up]{Command:\"kill @e[type=command_block_minecart,name=\\\"blk1\\\"]\", auto:true}",CustomName:'"blk1"'}]}]}