Universal Multiblock Viewer 0.3.0

Added

• Optional blocks in multiblock guides.
  • Optional blocks are hidden by default.
  • Use the O control to show or hide them.
  • Optional materials appear separately after required materials when enabled.
• A floor-grid toggle (G) to help with block placement.
• Alternative-material highlighting (A) to show positions with multiple valid blocks.
• Better handling for oversized custom block icons in viewer material lists.

Improved

• Block tags used in any_of alternatives now expand into their individual valid blocks.
• Duplicate alternatives are removed while retaining the explicitly authored default first.
• Required materials sharing the same selected block are combined into one total.
• Optional blocks, materials, alternatives, selections, layers and variants update consistently.
• Preview highlights are more stable during rotation and zoom.
• Help text and viewer polish have been improved.

For Guide Authors

• Palette entries may now use "optional": true.
• Optional entries support exact blocks, tags and any_of alternatives just like required entries.
• Tag alternatives are resolved from the active Minecraft registry, including modded tags, after resource reloads.
• Invalid or unresolved tags now produce useful warnings.
• See the JSON Authoring guide.

Notes

Universal Multiblock Viewer 0.3.0 does not bundle example multiblock definitions. Install guide JSONs through a resource pack or KubeJS to add guides to your game.

Separate guide asset packs for selected mods will be uploaded to CurseForge soon.