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--- faq:expert [2019/06/29 22:24] – created asie
+++ faq:expert [2019/06/29 22:29] – asie
@@ Line 12: / Line 12: @@
 The best approach here would be to port SpongeCommon and a modified version of SpongeVanilla as a Fabric mod implementing the Sponge API. As Fabric is using a fork of SpongePowered Mixin at its core, this is made somewhat easier - but the mappings differences make up for this, so to say.
+==== Why does Fabric API break OptiFine shaders? ====
+The rendering patch Fabric API uses, Indigo, assumes (for performance and code simplicity reasons) that the vanilla vertex format is kept intact. Mods generally don't change it, however ShadersMod and similar mods are a popular exception. As such, Indigo doesn't play nicely with it as-is.
+Solutions for this have been looked into, but not yet functional. In addition, some of the unofficial mod projects are trying to work on one themselves. The current workarounds will not work in the presence of content mods which actually make use of Fabric's rendering API.
 ===== Interoperability (Retro) =====