diff --git a/README.MD b/README.MD
index f0b87ef..98922fb 100644
--- a/README.MD
+++ b/README.MD
@@ -77,6 +77,7 @@ This mod also contains patches for the following mods:
 - Extra Planets
 - Extra Utilities
 - Factorization
+- FastCraft
 - Futurepack
 - Gadomancy
 - GalactiCraft
diff --git a/build.gradle.kts b/build.gradle.kts
index 689f274..4d064bd 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -156,6 +156,9 @@ dependencies {
     //Factorization 0.8.109
     compileOnly(deobfModrinth("factorization:0.8.109"))
 
+    //Fastcraft 1.23
+    compileOnly("curse.maven:fastcraft-242677:2292386")
+
     //Futurepack v18.7
     compileOnly(deobfCurse("futurepack-237333:2263966"))
 
diff --git a/src/main/java/com/falsepattern/endlessids/asm/EndlessIDsCore.java b/src/main/java/com/falsepattern/endlessids/asm/EndlessIDsCore.java
index 6c7966f..78b1618 100644
--- a/src/main/java/com/falsepattern/endlessids/asm/EndlessIDsCore.java
+++ b/src/main/java/com/falsepattern/endlessids/asm/EndlessIDsCore.java
@@ -24,6 +24,7 @@ package com.falsepattern.endlessids.asm;
 
 import com.falsepattern.endlessids.Tags;
 import com.falsepattern.endlessids.config.GeneralConfig;
+import com.falsepattern.endlessids.util.ConfigFixUtil;
 import lombok.SneakyThrows;
 import lombok.val;
 
@@ -32,6 +33,7 @@ import net.minecraft.launchwrapper.LaunchClassLoader;
 import cpw.mods.fml.relauncher.FMLInjectionData;
 import cpw.mods.fml.relauncher.IFMLLoadingPlugin;
 
+import java.io.IOException;
 import java.util.Map;
 import java.util.Set;
 
@@ -46,6 +48,17 @@ import static cpw.mods.fml.relauncher.IFMLLoadingPlugin.TransformerExclusions;
 @DependsOn("falsepatternlib")
 public class EndlessIDsCore implements IFMLLoadingPlugin {
     public static boolean deobfuscated;
+    static {
+        if (GeneralConfig.extendBlockItem) {
+            try {
+                if (Launch.classLoader.getClassBytes("fastcraft.Tweaker") != null) {
+                    FCCompat.patchConfig();
+                }
+            } catch (Exception ignored) {
+            }
+        }
+    }
+
     public EndlessIDsCore() {
         super();
         try {
diff --git a/src/main/java/com/falsepattern/endlessids/asm/FCCompat.java b/src/main/java/com/falsepattern/endlessids/asm/FCCompat.java
new file mode 100644
index 0000000..296b7f3
--- /dev/null
+++ b/src/main/java/com/falsepattern/endlessids/asm/FCCompat.java
@@ -0,0 +1,42 @@
+/*
+ * EndlessIDs
+ *
+ * Copyright (C) 2022-2025 FalsePattern, The MEGA Team
+ * All Rights Reserved
+ *
+ * The above copyright notice, this permission notice and the word "MEGA"
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, only version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.falsepattern.endlessids.asm;
+
+import com.falsepattern.endlessids.util.ConfigFixUtil;
+
+public class FCCompat {
+    public static void patchConfig() {
+        //Breaks with the blockitem module
+        ConfigFixUtil.fixConfig("fastcraft.ini", (line) -> {
+                                    if (line.contains("asyncCulling") || line.contains("enableCullingTweaks")) {
+                                        return line.replace("true", "false");
+                                    }
+                                    return line;
+                                }, () -> "[extra tweaks]\nasyncCulling = false\n[transparent tweaks]\nenableCullingTweaks=false\n",
+                                e -> {
+                                    System.err.println(
+                                            "Failed to apply FastCraft occlusion tweak compatibility patches!");
+                                    e.printStackTrace();
+                                });
+    }
+}
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/mixins/client/blockitem/fastcraft/EntityRendererMixin.java b/src/main/java/com/falsepattern/endlessids/mixin/mixins/client/blockitem/fastcraft/EntityRendererMixin.java
new file mode 100644
index 0000000..6924e1e
--- /dev/null
+++ b/src/main/java/com/falsepattern/endlessids/mixin/mixins/client/blockitem/fastcraft/EntityRendererMixin.java
@@ -0,0 +1,44 @@
+/*
+ * EndlessIDs
+ *
+ * Copyright (C) 2022-2025 FalsePattern, The MEGA Team
+ * All Rights Reserved
+ *
+ * The above copyright notice, this permission notice and the word "MEGA"
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, only version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.falsepattern.endlessids.mixin.mixins.client.blockitem.fastcraft;
+
+import org.spongepowered.asm.mixin.Dynamic;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import net.minecraft.client.renderer.EntityRenderer;
+import net.minecraft.client.renderer.RenderGlobal;
+import net.minecraft.entity.EntityLivingBase;
+
+@Mixin(EntityRenderer.class)
+public class EntityRendererMixin {
+    @Dynamic
+    @Redirect(method = "renderWorld",
+              at = @At(value = "INVOKE",
+                       target = "Lfastcraft/HC;t(Lnet/minecraft/client/renderer/RenderGlobal;Lnet/minecraft/entity/EntityLivingBase;Z)Z",
+                       remap = false))
+    private boolean killHook2(RenderGlobal rg, EntityLivingBase entity, boolean doUpdates) {
+        return rg.updateRenderers(entity, doUpdates);
+    }
+}
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java b/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
index b45ecb3..d811e28 100644
--- a/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
+++ b/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
@@ -54,6 +54,7 @@ import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.EXTENDEDPLANE
 import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.EXTRAPLANETS;
 import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.EXTRAUTILITIES;
 import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.FACTORIZATION;
+import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.FASTCRAFT;
 import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.FUTUREPACK;
 import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.GADOMANCY;
 import static com.falsepattern.endlessids.mixin.plugin.TargetedMod.GALACTICRAFTCORE;
@@ -353,6 +354,8 @@ public class Mixin {
         blockitem_vanilla_NetHandlerPlayClientMixin(EXT_BLOCK_ITEM),
         blockitem_vanilla_PlayerControllerMPMixin(EXT_BLOCK_ITEM),
         blockitem_vanilla_RenderGlobalMixin(EXT_BLOCK_ITEM),
+
+        blockitem_fastcraft_EntityRendererMixin(EXT_BLOCK_ITEM, require(FASTCRAFT)),
         //endregion
 
         //region potion
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java b/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java
index ccaca6e..2f01d81 100644
--- a/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java
+++ b/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java
@@ -55,6 +55,7 @@ public enum TargetedMod implements ITargetedMod {
     EXTRAPLANETS("Extra Planets", false, contains("extraplanets-")),
     EXTRAUTILITIES("Extra Utilities", false, contains("extrautilities-")),
     FACTORIZATION("Factorization", false, contains("factorization-")),
+    FASTCRAFT("Fastcraft", false, contains("fastcraft-")),
     FUTUREPACK("Futurepack", false, contains("futurepack")),
     GADOMANCY("Gadomancy", false, contains("gadomancy-")),
     GALACTICRAFTCORE("GalactiCraftCore", false, contains("galacticraftcore")),
diff --git a/src/main/java/com/falsepattern/endlessids/util/ConfigFixUtil.java b/src/main/java/com/falsepattern/endlessids/util/ConfigFixUtil.java
new file mode 100644
index 0000000..8e74593
--- /dev/null
+++ b/src/main/java/com/falsepattern/endlessids/util/ConfigFixUtil.java
@@ -0,0 +1,59 @@
+/*
+ * EndlessIDs
+ *
+ * Copyright (C) 2022-2025 FalsePattern, The MEGA Team
+ * All Rights Reserved
+ *
+ * The above copyright notice, this permission notice and the word "MEGA"
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, only version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.falsepattern.endlessids.util;
+
+import com.falsepattern.lib.util.FileUtil;
+import lombok.val;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.stream.Collectors;
+
+public class ConfigFixUtil {
+    public static void fixConfig(String configFile, Function<String, String> lineTransformer, Supplier<String> generator, Consumer<IOException> exceptionHandler) {
+        val targetPath = FileUtil.getMinecraftHomePath().resolve("config").resolve(configFile);
+        if (!Files.exists(targetPath)) {
+            val genned = generator.get();
+            if (genned == null) {
+                return;
+            }
+            try {
+                Files.write(targetPath, genned.getBytes(StandardCharsets.UTF_8));
+            } catch (IOException e) {
+                exceptionHandler.accept(e);
+            }
+            return;
+        }
+        try {
+            val fileText = Files.readAllLines(targetPath);
+            val result = fileText.stream().map(lineTransformer).collect(Collectors.toList());
+            Files.write(targetPath, result);
+        } catch (IOException e) {
+            exceptionHandler.accept(e);
+        }
+    }
+}
\ No newline at end of file