Intro to Blocks

Minecraft Bedrock allows us to add custom blocks into our world with various vanilla-like properties. In latest versions, custom blocks can have multiple stages (like plants), directional facing, and other features. This tutorial will cover how to create some simple blocks for the stable version of Minecraft Bedrock.

Block Behavior File #

Block behaviors are structured similarly to entities: they contain a description and a list of components that defines the block's behavior.

{
	"format_version": "1.19.80",
	"minecraft:block": {
		"description": {
			"identifier": "wiki:custom_block"
		},
		"components": {
			"minecraft:loot": "loot_tables/blocks/custom_block.json",
			"minecraft:destructible_by_mining": {
				"seconds_to_destroy": 3
			},
			"minecraft:destructible_by_explosion": {
				"explosion_resistance": 3
			},
			"minecraft:friction": 0.6,
			"minecraft:flammable": {
				"catch_chance_modifier": 0,
				"destroy_chance_modifier": 0
			},
			"minecraft:map_color": "#FFFFFF",
			"minecraft:light_dampening": 0,
			"minecraft:light_emission": 4
		}
	}
}

• "identifier" under "description" is already familiar to us.
• "components"
  • "minecraft:loot" defines a loot table path for the block to drop. If this is removed, then the block will drop itself. You can learn more about loot tables here.
  • "minecraft:destructible_by_mining" defines how long the player will need to mine the block until it breaks. Currently, it isn't possible to set different destroy times for different tools.
  • "minecraft:destructible_by_explosion" defines the chance for an explosion to break the block. Higher the value, lower the chance.
  • "minecraft:friction" defines how much friction the block has. For example, soulsand has a low value for friction, so it slows the players. Ice has a higher friction value, so it has a slippery effect. The friction of classic blocks such as wood or stone is 0.6.
  • "minecraft:flammable"
    • "catch_chance_modifier" defines how likely the block is to catch fire.
    • "destroy_chance_modifier" defines how likely the block is to be destroyed by fire.
  • "minecraft:map_color" is the hex color code that will be displayed on a Minecraft map to symbolize this block. #FFFFFF means white. You can get hex codes for other colors here.
  • "minecraft:light_dampening" defines the light level the block will absorb. Light level is from 0-15.
  • "minecraft:light_emission" defines the light level the block will output. Light level is from 0-15.

Let's create some more blocks in BP/blocks. I created these four block for the tutorial:

• Filename: custom_block.json; Identifier: wiki:custom_block;
• Filename: custom_log.json; Identifier: wiki:custom_log;
• Filename: compass_block.json; Identifier: wiki:compass_block;
• Filename: flashing.json; Identifier: wiki:flashing; You can play around with changing the component values for each of these. Let's now define the blocks's visuals.

Block Visuals #

Setting up a block's visuals takes place in two places, terrain_texture.json and the block file.

These "gorgeous" textures are the ones used for the example blocks. The first three are located in the RP/textures/blocks/ folder and, the last 6 are located in the RP/textures/blocks/compass_block subfolder - they show North, South, etc.

Left to right: blocky.png, sapp_log_side.png, side_block_top.png, sb_up.png, sb_down.png, sb_north.png, sb_south.png, sb_west.png, sb_east.png

All textures need to define a shortname and we'll do it the same way as we defined item texture shortnames in RP/textures/item_texture.json, but this time in RP/textures/terrain_texture.json

{
	"resource_pack_name": "wiki",
	"texture_name": "atlas.terrain",
	"padding": 8,
	"num_mip_levels": 4,
	"texture_data": {
		"blocky": {
			"textures": "textures/blocks/blocky"
		},
		"sapp_log_top": {
			"textures": "textures/blocks/sapp_log_top"
		},
		"sapp_log_side": {
			"textures": "textures/blocks/sapp_log_side"
		},
		"compass_block_north": {
			"textures": "textures/blocks/compass_block/sb_north"
		},
		"compass_block_east": {
			"textures": "textures/blocks/compass_block/sb_east"
		},
		"compass_block_west": {
			"textures": "textures/blocks/compass_block/sb_west"
		},
		"compass_block_south": {
			"textures": "textures/blocks/compass_block/sb_south"
		},
		"compass_block_up": {
			"textures": "textures/blocks/compass_block/sb_up"
		},
		"compass_block_down": {
			"textures": "textures/blocks/compass_block/sb_down"
		}
	}
}

The only difference from item_textures.json is that "atlas.items" is now changed to "atlas.terrain".

"padding" and "num_mip_levels" mean the quality of how the texture is displayed, especially noticeable on higher resolution textures. The performance will be better if it's lower, but the textures will appear glitchy from further distances.

Now that texture shortnames have been defined, the game still needs to know what textures to use for the blocks. Blocks will use the material_instances component to tell the game which shortname to use. Add the following component to the blocks with the appropriate shortname.

{
	"minecraft:material_instances": {
		"*": {
			"texture": "blocky"
		}
	}
}

But, we still have to define the wiki:flashing texture(third from the left), which is currently undefined. That's why it appears as a dirt block with "update" written on it.

Block Flipbook Texture Definition #

As you might have already guessed, flipbook texture shortnames are defined in a different place than RP/textures/terrain_texture.json. Let's create another file RP/textures/flipbook_textures.json.

[
	{
		"flipbook_texture": "textures/blocks/flashing_flipbook",
		"atlas_tile": "flashing",
		"ticks_per_frame": 13
	}
]

• "flipbook_texture" is the path to your texture file, which is named "flashing_flipbook" in this scenario.
• "atlas_tile" is the shortname definition. As you know, we already applied "flashing" texture shortname to the wiki:flashing block in RP/blocks.json.
• "ticks_per_frame" defines how quickly the different textures will fade into the block, in other words, the speed of the animation.

You can read more about flipbook textures here.

A flipbook texture file is created like this:

• The image width is 16;
• Image height is 16*3, as we have three different block textures/frames to fade. If you wanted a flipbook with 12 different textures, the height would be 16*12.

Done! All of our blocks work perfectly.

Setting block names #

And, finally, let's define our block's names in /RP/texts/en_US.lang as we did with items, somewhat like this:

tile.wiki:blocky.name=Blocky Block
tile.wiki:sapp_log.name=Sapphire Wood
tile.wiki:compass_block.name=A compass in block-form
tile.wiki:flashing.name=Block of Flashing Matter

You can learn more about translation keys here.

What you have learned #