Quite simply, the spritesheet used in IC2 is not compatible with Minecraft Exteneded.
Normal modloader sprite loading can fix this problem.
Compatibilty with another mod.
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- Official Post
Quite simply, the spritesheet used in IC2 is not compatible with Minecraft Exteneded.
Normal modloader sprite loading can fix this problem.
More or less, Minecraft Extended is not Compatible with Minecraft Forge.