the patterning

src/main/java/gregtech/api/capability/GregtechDataCodes.java

@@ -80,6 +80,7 @@ public static int assignId() {
     public static final int UPDATE_STRUCTURE_SIZE = assignId();
     public static final int STRUCTURE_FORMED = assignId();
     public static final int VARIANT_RENDER_UPDATE = assignId();
+    public static final int RENDER_UPDATE = assignId();
     public static final int IS_TAPED = assignId();
     public static final int STORE_MAINTENANCE = assignId();
     public static final int STORE_TAPED = assignId();

src/main/java/gregtech/api/capability/IDistillationTower.java

@@ -4,15 +4,15 @@
 
 import net.minecraft.util.math.BlockPos;
 
-import java.util.List;
+import java.util.NavigableSet;
 
 /**
  * intended for use in conjunction with {@link gregtech.api.capability.impl.DistillationTowerLogicHandler}
  * use with distillation tower type multiblocks
  */
 public interface IDistillationTower {
 
-    List<IMultiblockPart> getMultiblockParts();
+    NavigableSet<IMultiblockPart> getMultiblockParts();
 
     BlockPos getPos();
 

src/main/java/gregtech/api/capability/IMultiblockController.java

@@ -1,8 +1,14 @@
 package gregtech.api.capability;
 
+import gregtech.api.metatileentity.multiblock.MultiblockControllerBase;
+
 public interface IMultiblockController {
 
-    boolean isStructureFormed();
+    boolean isStructureFormed(String name);
+
+    default boolean isStructureFormed() {
+        return isStructureFormed(MultiblockControllerBase.DEFAULT_STRUCTURE);
+    }
 
     default boolean isStructureObstructed() {
         return false;

src/main/java/gregtech/api/capability/impl/DistillationTowerLogicHandler.java

@@ -4,7 +4,7 @@
 import gregtech.api.capability.IMultipleTankHandler;
 import gregtech.api.metatileentity.multiblock.IMultiblockAbilityPart;
 import gregtech.api.metatileentity.multiblock.MultiblockAbility;
-import gregtech.api.pattern.BlockPattern;
+import gregtech.api.pattern.pattern.BlockPattern;
 import gregtech.api.util.GTLog;
 import gregtech.common.metatileentities.multi.multiblockpart.MetaTileEntityMultiblockPart;
 
@@ -63,7 +63,7 @@ public boolean applyFluidToOutputs(List<FluidStack> fluids, boolean doFill) {
      * @param structurePattern the structure pattern
      */
     public void determineLayerCount(@NotNull BlockPattern structurePattern) {
-        this.setLayerCount(structurePattern.formedRepetitionCount[1] + 1);
+        this.setLayerCount(structurePattern.getRepetitionCount(1) + 1);
     }
 
     /**

src/main/java/gregtech/api/metatileentity/multiblock/IMultiblockPart.java

@@ -1,12 +1,36 @@
 package gregtech.api.metatileentity.multiblock;
 
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
 public interface IMultiblockPart {
 
     boolean isAttachedToMultiBlock();
 
-    void addToMultiBlock(MultiblockControllerBase controllerBase);
+    default void addToMultiBlock(@NotNull MultiblockControllerBase controllerBase) {
+        addToMultiBlock(controllerBase, MultiblockControllerBase.DEFAULT_STRUCTURE);
+    }
+
+    void addToMultiBlock(@NotNull MultiblockControllerBase controllerBase, @NotNull String substructureName);
+
+    void removeFromMultiBlock(@NotNull MultiblockControllerBase controllerBase);
 
-    void removeFromMultiBlock(MultiblockControllerBase controllerBase);
+    /**
+     * Gets how many multiblocks are currently using the part.
+     */
+    int getWallshareCount();
+
+    /**
+     * Gets the name of the substructure the part is attached to, or null if it is not attached.
+     */
+    @Nullable
+    String getSubstructureName();
+
+    boolean canPartShare(MultiblockControllerBase target, String substructureName);
+
+    default boolean canPartShare(MultiblockControllerBase target) {
+        return canPartShare(target, MultiblockControllerBase.DEFAULT_STRUCTURE);
+    }
 
     default boolean canPartShare() {
         return true;