Material

src/main/java/com/gregtechceu/gtceu/api/block/MaterialBlock.java

@@ -3,6 +3,7 @@
 import com.gregtechceu.gtceu.GTCEu;
 import com.gregtechceu.gtceu.api.blockentity.PipeBlockEntity;
 import com.gregtechceu.gtceu.api.data.chemical.material.Material;
+import com.gregtechceu.gtceu.api.data.chemical.material.info.MaterialFlags;
 import com.gregtechceu.gtceu.api.data.tag.TagPrefix;
 import com.gregtechceu.gtceu.api.item.PipeBlockItem;
 import com.gregtechceu.gtceu.api.item.tool.GTToolType;
@@ -72,7 +73,7 @@ public MaterialBlock(Properties properties, TagPrefix tagPrefix, Material materi
     }
 
     public MaterialBlock(Properties properties, TagPrefix tagPrefix, Material material) {
-        this(properties, tagPrefix, material, true);
+        this(properties, tagPrefix, material, !material.hasFlag(MaterialFlags.CUSTOM_TEXTURE));
     }
 
     @OnlyIn(Dist.CLIENT)

src/main/java/com/gregtechceu/gtceu/api/data/chemical/material/Material.java

@@ -17,6 +17,7 @@
 import com.gregtechceu.gtceu.api.fluids.store.FluidStorageKeys;
 import com.gregtechceu.gtceu.api.item.tool.MaterialToolTier;
 import com.gregtechceu.gtceu.api.registry.registrate.BuilderBase;
+import com.gregtechceu.gtceu.client.renderer.item.TagPrefixItemRenderer;
 import com.gregtechceu.gtceu.common.data.GTMaterials;
 import com.gregtechceu.gtceu.common.data.GTMedicalConditions;
 import com.gregtechceu.gtceu.integration.kjs.helpers.MaterialStackWrapper;
@@ -93,6 +94,10 @@ public class Material implements Comparable<Material> {
     @Getter
     private List<TagKey<Item>> itemTags = new ArrayList<>();
 
+    @Setter
+    @Getter
+    private TagPrefixItemRenderer.MaterialModel customModel;
+
     private String calculateChemicalFormula() {
         if (chemicalFormula != null) return this.chemicalFormula;
         if (materialInfo.element != null) {
@@ -595,6 +600,9 @@ public static class Builder extends BuilderBase<Material> {
          *                         "material.<name>" for the Translation Key.
          * @since GTCEu 2.0.0
          */
+
+        private TagPrefixItemRenderer.MaterialModel customModel;
+
         public Builder(ResourceLocation resourceLocation) {
             super(resourceLocation);
             String name = resourceLocation.getPath();
@@ -1833,6 +1841,11 @@ public Builder addDefaultEnchant(Enchantment enchant, int level) {
             return this;
         }
 
+        public Builder customModel(TagPrefixItemRenderer.MaterialModel customModel) {
+            this.customModel = customModel;
+            return this;
+        }
+
         /**
          * Verify the passed information and finalize the Material.
          *
@@ -1870,6 +1883,9 @@ public Material buildAndRegister() {
             if (ignoredTagPrefixes != null) {
                 ignoredTagPrefixes.forEach(p -> p.setIgnored(mat));
             }
+
+            mat.setCustomModel(customModel);
+
             return mat;
         }
 

src/main/java/com/gregtechceu/gtceu/api/data/chemical/material/info/MaterialFlags.java

@@ -320,4 +320,7 @@ public String toString() {
     public static final MaterialFlag HIGH_SIFTER_OUTPUT = new MaterialFlag.Builder("high_sifter_output")
             .requireProps(PropertyKey.GEM, PropertyKey.ORE)
             .build();
+
+    public static final MaterialFlag CUSTOM_TEXTURE = new MaterialFlag.Builder("custom_texture")
+            .build();
 }

src/main/java/com/gregtechceu/gtceu/api/item/TagPrefixItem.java

@@ -3,6 +3,7 @@
 import com.gregtechceu.gtceu.GTCEu;
 import com.gregtechceu.gtceu.api.GTValues;
 import com.gregtechceu.gtceu.api.data.chemical.material.Material;
+import com.gregtechceu.gtceu.api.data.chemical.material.info.MaterialFlags;
 import com.gregtechceu.gtceu.api.data.chemical.material.properties.DustProperty;
 import com.gregtechceu.gtceu.api.data.chemical.material.properties.PropertyKey;
 import com.gregtechceu.gtceu.api.data.tag.TagPrefix;
@@ -41,7 +42,7 @@ public TagPrefixItem(Properties properties, TagPrefix tagPrefix, Material materi
         super(properties);
         this.tagPrefix = tagPrefix;
         this.material = material;
-        if (GTCEu.isClientSide()) {
+        if (GTCEu.isClientSide() && !material.hasFlag(MaterialFlags.CUSTOM_TEXTURE)) {
             TagPrefixItemRenderer.create(this, tagPrefix.materialIconType(), material.getMaterialIconSet());
         }
     }

src/main/java/com/gregtechceu/gtceu/client/renderer/item/TagPrefixItemRenderer.java

@@ -10,6 +10,9 @@
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Item;
 
+import com.tterrag.registrate.providers.DataGenContext;
+import com.tterrag.registrate.providers.RegistrateItemModelProvider;
+
 import java.util.HashSet;
 import java.util.Set;
 
@@ -46,4 +49,9 @@ private TagPrefixItemRenderer(Item item, MaterialIconType type, MaterialIconSet
         this.type = type;
         this.iconSet = iconSet;
     }
+
+    public interface MaterialModel {
+
+        void generate(DataGenContext<Item, Item> ctx, RegistrateItemModelProvider prov);
+    }
 }

src/main/java/com/gregtechceu/gtceu/common/data/GTMaterialBlocks.java

@@ -5,6 +5,7 @@
 import com.gregtechceu.gtceu.api.block.MaterialBlock;
 import com.gregtechceu.gtceu.api.block.MaterialPipeBlock;
 import com.gregtechceu.gtceu.api.data.chemical.material.Material;
+import com.gregtechceu.gtceu.api.data.chemical.material.info.MaterialFlags;
 import com.gregtechceu.gtceu.api.data.chemical.material.properties.PropertyKey;
 import com.gregtechceu.gtceu.api.data.chemical.material.registry.MaterialRegistry;
 import com.gregtechceu.gtceu.api.data.tag.TagPrefix;
@@ -73,22 +74,33 @@ public static void generateMaterialBlocks() {
     }
 
     private static void registerMaterialBlock(TagPrefix tagPrefix, Material material, GTRegistrate registrate) {
-        MATERIAL_BLOCKS_BUILDER.put(tagPrefix, material, registrate
+        var blockBuilder = registrate
                 .block(tagPrefix.idPattern().formatted(material.getName()),
                         properties -> tagPrefix.blockConstructor().create(properties, tagPrefix, material))
                 .initialProperties(() -> Blocks.IRON_BLOCK)
                 .properties(p -> tagPrefix.blockProperties().properties().apply(p).noLootTable())
                 .transform(GTBlocks.unificationBlock(tagPrefix, material))
                 .addLayer(tagPrefix.blockProperties().renderType())
-                .setData(ProviderType.BLOCKSTATE, NonNullBiConsumer.noop())
                 .setData(ProviderType.LANG, NonNullBiConsumer.noop())
-                .setData(ProviderType.LOOT, NonNullBiConsumer.noop())
-                .color(() -> MaterialBlock::tintedColor)
-                .item((b, p) -> tagPrefix.blockItemConstructor().create(b, p, tagPrefix, material))
-                .model(NonNullBiConsumer.noop())
-                .color(() -> () -> MaterialBlockItem.tintColor(material))
-                .build()
-                .register());
+                .setData(ProviderType.LOOT, NonNullBiConsumer.noop());
+
+        if (!material.hasFlag(MaterialFlags.CUSTOM_TEXTURE)) {
+            blockBuilder.setData(ProviderType.BLOCKSTATE, NonNullBiConsumer.noop())
+                    .color(() -> MaterialBlock::tintedColor);
+        }
+
+        var itemBuilder = blockBuilder
+                .item((b, p) -> tagPrefix.blockItemConstructor().create(b, p, tagPrefix, material));
+
+        if (!material.hasFlag(MaterialFlags.CUSTOM_TEXTURE)) {
+            itemBuilder.model(NonNullBiConsumer.noop())
+                    .color(() -> () -> MaterialBlockItem.tintColor(material));
+        }
+
+        itemBuilder.build();
+
+        // TODO: Allow custom model for each tagPrefix
+        MATERIAL_BLOCKS_BUILDER.put(tagPrefix, material, blockBuilder.register());
     }
 
     // Material Ore Blocks

src/main/java/com/gregtechceu/gtceu/common/data/GTMaterialItems.java

@@ -85,18 +85,23 @@ public static void generateMaterialItems() {
     }
 
     private static void generateMaterialItem(TagPrefix tagPrefix, Material material, GTRegistrate registrate) {
-        MATERIAL_ITEMS_BUILDER.put(tagPrefix, material, registrate
-                .item(tagPrefix.idPattern().formatted(material.getName()),
-                        properties -> tagPrefix.itemConstructor()
-                                .create(material.hasFlag(MaterialFlags.FIRE_RESISTANT) ? properties.fireResistant() :
-                                        properties, tagPrefix, material))
+        var builder = registrate.item(tagPrefix.idPattern().formatted(material.getName()),
+                properties -> tagPrefix.itemConstructor()
+                        .create(material.hasFlag(MaterialFlags.FIRE_RESISTANT) ? properties.fireResistant() :
+                                properties, tagPrefix, material))
                 .setData(ProviderType.LANG, NonNullBiConsumer.noop())
                 .transform(GTItems.unificationItem(tagPrefix, material))
                 .properties(p -> p.stacksTo(tagPrefix.maxStackSize()))
-                .model(NonNullBiConsumer.noop())
-                .color(() -> () -> TagPrefixItem.tintColor(material))
-                .onRegister(GTItems::cauldronInteraction)
-                .register());
+                .onRegister(GTItems::cauldronInteraction);
+
+        if (!material.hasFlag(MaterialFlags.CUSTOM_TEXTURE)) {
+            builder.model(NonNullBiConsumer.noop())
+                    .color(() -> () -> TagPrefixItem.tintColor(material));
+        } else if (material.getCustomModel() != null) {
+            builder.model(material.getCustomModel()::generate);
+        }
+
+        MATERIAL_ITEMS_BUILDER.put(tagPrefix, material, builder.register());
     }
 
     // Material Tools