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

• water_surface_transparency Fixed in 1.21.60.24
• 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.

Default values can be configured to automatically override biomes which are not otherwise specified, like in 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.

Default values cannot be configured, so packs which change water will have to be updated for every new biome addition.

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