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Resource pack troubleshooting
Fabulously Optimized supports various OptiFine features, including resource pack extras. However, the implementation differs from mod to mod and some resource packs are accepted in OptiFine even if they are broken, so this page should help you fix some of those issues.
Is the resource pack actually built for the version you're running? If not, check for the latest version or use a converter tool like this one or the official one.
If you see this message while activating a resource pack:

Contains broken paths
This means the resource pack maker is using spaces or other non-standard characters in the file or folder names.
If this is the case, the modpack will warn you and allow overriding it, but note that various glitches may occur (miscolored or invisible blocks, lightning issues, broken textures...).
To fix that, please tell the resource pack maker to only use the following characters in file/folder names:
a-z0-9._-
.Or "game brightness beyond 100%".
Currently the vanilla resource pack and OptiFine resource pack methods do not work, and neither will work a direct options.txt edit. Instead, just add a specialized mod, such as Methane or other simpler ones.
Fabulously Optimized does not plan to add "fullbright" methods beyond its current dynamic lighting, because it would take away from vanilla gameplay's night vision and may be disallowed on certain servers' rules.
This may occur when the pack is using broken paths and is trying to change the models of some blocks, like chests.
Enhanced Block Entities is the mod that makes various blocks faster on most versions of FO. Some optimizations may not be supported by your resource packs, so here's how to configure it:
- 1.Click
Mods
- 2.Search for "Enhanced Block Entities", click the config button
- 3.Enable "Force Resource Pack Compatibility"
- If that doesn't help or the option is not visible, disable any blocks that seem broken to you. Usually disabling
Enhanced Chests
is enough.
- 4.Click
Done
Some versions of FO include Better Beds instead.
- 1.Close the game
- 2.Remove or disable the Better Beds mod from your launcher.
- 3.Start the game and see if it is fixed.
- 1.Click
Mods
- 2.Search for "FastChest", click the config button
- 3.Disable the mod, click
Done
.
Does the resource pack change the UI beyond usual means (e.g. rearrange HUD elements)?
Coloring blocks differently by biome is currently not supported since FO 4.5.7, but planned to be reintroduced soon.
Or "mobs with a custom shape".
If the entities are missing parts of their body, try this:
- 1.Click
Mods
- 2.Search for "Entity Model Features", click the config button (top right, above
Issues
) - 3.Set "Substitute missing model parts" to
Yes
- 4.Click
Save changes
andDone
If your resource pack's entities are supported but are still not displayed correctly, you can try this:
- 1.Click
Mods
- 2.Search for "Custom Entity Models", click the config button (top right, above
Issues
) - 3.Set "Use model creation fix?" to
No
- 4.Click
Save & Quit
andDone
- 5.In your world, hold down
F3
(andFn
on laptops), pressT
- 6.You'll see a short loading screen. After that, check if the models are displayed correctly.
- 7.If they still are not, set that setting back to
Yes
and disable your resource pack, wait for CEM to implement them.- Or if you want to continue using your resource pack without the models, disable the optifine setting in CEM to essentially disable the mod.
Last modified 10d ago