Added a temporary texture overlay (borrowed from the Faithful 32x texture pack, until a unique one is made) for the corrupted zombie. Generalized enough so that new mobs can have them added easily.

src/main/java/WayofTime/bloodmagic/client/render/entity/RenderCorruptedZombie.java

@@ -1,8 +1,6 @@
 package WayofTime.bloodmagic.client.render.entity;
 
-import java.util.List;
-
-import net.minecraft.client.model.ModelBiped;
+import net.minecraft.client.model.ModelCreeper;
 import net.minecraft.client.model.ModelZombie;
 import net.minecraft.client.model.ModelZombieVillager;
 import net.minecraft.client.renderer.entity.RenderBiped;
@@ -14,23 +12,19 @@ import net.minecraft.client.renderer.entity.layers.LayerRenderer;
 import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
+import WayofTime.bloodmagic.client.render.entity.layer.LayerWill;
 import WayofTime.bloodmagic.entity.mob.EntityCorruptedZombie;
 
-import com.google.common.collect.Lists;
-
 @SideOnly(Side.CLIENT)
 public class RenderCorruptedZombie extends RenderBiped<EntityCorruptedZombie>
 {
     private static final ResourceLocation ZOMBIE_TEXTURES = new ResourceLocation("bloodmagic", "textures/entities/zombie_raw.png");
-    private final ModelBiped defaultModel;
     private final ModelZombieVillager zombieVillagerModel;
-    private final List<LayerRenderer<EntityCorruptedZombie>> defaultLayers;
 
     public RenderCorruptedZombie(RenderManager renderManagerIn)
     {
         super(renderManagerIn, new ModelZombie(), 0.5F, 1.0F);
         LayerRenderer<?> layerrenderer = (LayerRenderer) this.layerRenderers.get(0);
-        this.defaultModel = this.modelBipedMain;
         this.zombieVillagerModel = new ModelZombieVillager();
         this.addLayer(new LayerHeldItem(this));
         LayerBipedArmor layerbipedarmor = new LayerBipedArmor(this)
@@ -42,7 +36,6 @@ public class RenderCorruptedZombie extends RenderBiped<EntityCorruptedZombie>
             }
         };
         this.addLayer(layerbipedarmor);
-        this.defaultLayers = Lists.newArrayList(this.layerRenderers);
 
         if (layerrenderer instanceof LayerCustomHead)
         {
@@ -51,6 +44,7 @@ public class RenderCorruptedZombie extends RenderBiped<EntityCorruptedZombie>
         }
 
         this.removeLayer(layerbipedarmor);
+        this.addLayer(new LayerWill<EntityCorruptedZombie>(this, new ModelZombie(1.2f, false)));
     }
 
     /**
@@ -67,7 +61,6 @@ public class RenderCorruptedZombie extends RenderBiped<EntityCorruptedZombie>
      */
     public void doRender(EntityCorruptedZombie entity, double x, double y, double z, float entityYaw, float partialTicks)
     {
-        this.swapArmor(entity);
         super.doRender(entity, x, y, z, entityYaw, partialTicks);
     }
 
@@ -76,27 +69,12 @@ public class RenderCorruptedZombie extends RenderBiped<EntityCorruptedZombie>
      * unless you call Render.bindEntityTexture.
      */
     protected ResourceLocation getEntityTexture(EntityCorruptedZombie entity)
-    {
-
     {
         return ZOMBIE_TEXTURES;
     }
-    }
-
-    private void swapArmor(EntityCorruptedZombie zombie)
-    {
-
-        {
-            this.mainModel = this.defaultModel;
-            this.layerRenderers = this.defaultLayers;
-        }
-
-        this.modelBipedMain = (ModelBiped) this.mainModel;
-    }
 
     protected void rotateCorpse(EntityCorruptedZombie entityLiving, float p_77043_2_, float p_77043_3_, float partialTicks)
     {
-
         super.rotateCorpse(entityLiving, p_77043_2_, p_77043_3_, partialTicks);
     }
 }

src/main/java/WayofTime/bloodmagic/client/render/entity/layer/LayerWill.java

@@ -0,0 +1,59 @@
+package WayofTime.bloodmagic.client.render.entity.layer;
+
+import net.minecraft.client.model.ModelBase;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.renderer.entity.RenderLiving;
+import net.minecraft.client.renderer.entity.layers.LayerCreeperCharge;
+import net.minecraft.client.renderer.entity.layers.LayerRenderer;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+import WayofTime.bloodmagic.entity.mob.EntityDemonBase;
+
+@SideOnly(Side.CLIENT)
+public class LayerWill<T extends EntityDemonBase> implements LayerRenderer<T>
+{
+    private static final ResourceLocation LIGHTNING_TEXTURE = new ResourceLocation("bloodmagic", "textures/entities/overlay/overlay_raw.png");
+    private final RenderLiving<T> renderer;
+    private final ModelBase model;
+
+    public LayerWill(RenderLiving<T> rendererIn, ModelBase model)
+    {
+        this.renderer = rendererIn;
+        this.model = model;
+    }
+
+    @Override
+    public void doRenderLayer(EntityDemonBase entitylivingbaseIn, float limbSwing, float limbSwingAmount, float partialTicks, float ageInTicks, float netHeadYaw, float headPitch, float scale)
+    {
+//        if (entitylivingbaseIn.getPowered())
+        {
+            boolean flag = entitylivingbaseIn.isInvisible();
+            GlStateManager.depthMask(!flag);
+            this.renderer.bindTexture(LIGHTNING_TEXTURE);
+            GlStateManager.matrixMode(5890);
+            GlStateManager.loadIdentity();
+            float f = (float) entitylivingbaseIn.ticksExisted + partialTicks;
+            GlStateManager.translate(f * 0.01F, f * 0.01F, 0.0F);
+            GlStateManager.matrixMode(5888);
+            GlStateManager.enableBlend();
+            float f1 = 0.5F;
+            GlStateManager.color(0.5F, 0.5F, 0.5F, 1.0F);
+            GlStateManager.disableLighting();
+            GlStateManager.blendFunc(GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ONE);
+            this.model.setModelAttributes(this.renderer.getMainModel());
+            this.model.render(entitylivingbaseIn, limbSwing, limbSwingAmount, ageInTicks, netHeadYaw, headPitch, scale);
+            GlStateManager.matrixMode(5890);
+            GlStateManager.loadIdentity();
+            GlStateManager.matrixMode(5888);
+            GlStateManager.enableLighting();
+            GlStateManager.disableBlend();
+            GlStateManager.depthMask(flag);
+        }
+    }
+
+    public boolean shouldCombineTextures()
+    {
+        return false;
+    }
+}

src/main/java/WayofTime/bloodmagic/item/sigil/ItemSigilDivination.java

@@ -16,6 +16,7 @@ import WayofTime.bloodmagic.api.altar.IBloodAltar;
 import WayofTime.bloodmagic.api.iface.IAltarReader;
 import WayofTime.bloodmagic.api.util.helper.NetworkHelper;
 import WayofTime.bloodmagic.api.util.helper.PlayerHelper;
+import WayofTime.bloodmagic.entity.mob.EntityCorruptedZombie;
 import WayofTime.bloodmagic.tile.TileIncenseAltar;
 import WayofTime.bloodmagic.tile.TileInversionPillar;
 import WayofTime.bloodmagic.util.ChatUtil;
@@ -39,12 +40,12 @@ public class ItemSigilDivination extends ItemSigilBase implements IAltarReader
 //            DungeonTester.testDungeonElementWithOutput((WorldServer) world, player.getPosition());
 //        }
 
-//        if (!world.isRemote)
-//        {
-//            EntityCorruptedZombie fred = new EntityCorruptedZombie(world);
-//            fred.setPosition(player.posX, player.posY, player.posZ);
-//            world.spawnEntityInWorld(fred);
-//        }
+        if (!world.isRemote)
+        {
+            EntityCorruptedZombie fred = new EntityCorruptedZombie(world);
+            fred.setPosition(player.posX, player.posY, player.posZ);
+            world.spawnEntityInWorld(fred);
+        }
 
         if (!world.isRemote)
         {