Four options from the old biomes_client file cannot be used in the new, separated client_biome files. These options are:

• water_surface_transparency
• remove_all_prior_fog
• inherit_from_prior_fog
• fog_ids_to_merge

In addition, there is no way to create a "default" biome configuration that overwrites all other biomes.

The "water_surface_transparency" property in particular is required for many resource packs. Losing this functionality will prevent pack creators from switching to the updated system.

Old biomes_client.json Features:

New client_biome Features:

Expected Result

client_biome files provide an updated biome visuals system, fully deprecating biomes_client.json.

New biomes (added post-1.21.40) can have their water transparency configured by modifying vanilla pack files, just like biomes_client used to.

Observed Result

client_biome files lack all the options necessary to recreate biomes_client.json functionality, forcing resource pack creators to stick with the old system.

A Pale Garden entry must be manually added to biomes_client.json to change water transparency.