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Block transport classes

Radiation diffusivity by block.

File: data/<namespace>/hbm/rad_diffusivity/<class>.json.

{
  "blocks": ["minecraft:water", "minecraft:lava"],
  "value": 0.55
}
FieldMeaning and defaultRange
blocksBlock ID, block tag, or ID list; selects every state of each block.
valueTransport coefficient; unmapped blocks use 1.0.0.01–1.50

Tag membership is resolved when the world opens. Reopen or restart after changing a referenced tag.

When classes overlap, the lowest non-neutral value wins. To change an existing classification, replace the original resource or adjust its block list.

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