Normalise GL.pop/pushAttribute method usage. Docs say we shouldn't use the GlStateManager methods. I'm include to agree. I don't think they're meant for general popping/pushing of all attributes.

src/hdskins/java/com/minelittlepony/gui/SettingsPanel.java

@@ -8,7 +8,6 @@ import com.mumfrey.liteloader.modconfig.ConfigPanelHost;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.GuiButton;
-import net.minecraft.client.renderer.GlStateManager;
 
 import org.lwjgl.opengl.GL11;
 
@@ -76,7 +75,7 @@ public abstract class SettingsPanel extends GameGui implements ConfigPanel {
 
         postDrawContents(mouseX, mouseY, partialTicks);
 
-        GlStateManager.popAttrib();
+        GL11.glPopAttrib();
     }
 
     @Override

src/hdskins/java/com/voxelmodpack/hdskins/gui/GuiSkins.java

@@ -474,7 +474,7 @@ public class GuiSkins extends GameGui implements ISkinUploadHandler {
  */
 
     private void enableClipping(int yBottom) {
-        popAttrib();
+        GL11.glPopAttrib();
 
         if (doubleBuffer == null) {
             doubleBuffer = BufferUtils.createByteBuffer(32).asDoubleBuffer();

src/hdskins/java/com/voxelmodpack/hdskins/gui/RenderPlayerModel.java

@@ -149,7 +149,7 @@ public class RenderPlayerModel<M extends EntityPlayerModel> extends RenderLiving
         color(1, 1, 1, 1);
         disableBlend();
         popMatrix();
-        popAttrib();
+        GL11.glPopAttrib();
 
         GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS);
         pushMatrix();
@@ -162,8 +162,7 @@ public class RenderPlayerModel<M extends EntityPlayerModel> extends RenderLiving
 
         super.doRender(entity, x, y, z, entityYaw, partialTicks);
         popMatrix();
-        popAttrib();
+        GL11.glPopAttrib();
-
     }
 
     static class BedHead extends TileEntityBed {
@@ -192,7 +191,7 @@ public class RenderPlayerModel<M extends EntityPlayerModel> extends RenderLiving
             dispatcher.getRenderer(this).render(BedHead.instance, -0.5F, 0, 0, 0, -1, 1);
 
             popMatrix();
-            popAttrib();
+            GL11.glPopAttrib();
         }
     }
 
@@ -214,7 +213,7 @@ public class RenderPlayerModel<M extends EntityPlayerModel> extends RenderLiving
             render.doRender(this, 0, 0, 0, 0, 0);
 
             popMatrix();
-            popAttrib();
+            GL11.glPopAttrib();
         }
     }
 }

src/main/java/com/minelittlepony/model/components/SeaponyTail.java

@@ -66,7 +66,7 @@ public class SeaponyTail implements IModelPart {
         GlStateManager.enableBlend();
         tailBase.render(scale);
         GlStateManager.disableBlend();
-        GlStateManager.popAttrib();
+        GL11.glPopAttrib();
     }
 
 }

src/main/java/com/minelittlepony/model/components/UnicornHorn.java

@@ -58,7 +58,7 @@ public class UnicornHorn implements IModelPart {
             enableTexture2D();
             enableLighting();
             disableBlend();
-            popAttrib();
+            glPopAttrib();
         }
     }
 

src/main/java/com/minelittlepony/model/gear/AbstractGear.java

@@ -3,7 +3,6 @@ package com.minelittlepony.model.gear;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.model.ModelBase;
 import net.minecraft.client.model.ModelRenderer;
-import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.texture.TextureManager;
 import net.minecraft.entity.Entity;
 
@@ -42,6 +41,6 @@ public abstract class AbstractGear extends ModelBase implements IGear, PonyModel
 
         renderPart(scale);
 
-        GlStateManager.popAttrib();
+        GL11.glPopAttrib();
     }
 }

src/main/java/com/minelittlepony/model/gear/ChristmasHat.java

@@ -1,10 +1,11 @@
 package com.minelittlepony.model.gear;
 
-import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.entity.Entity;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.math.MathHelper;
 
+import org.lwjgl.opengl.GL11;
+
 import com.minelittlepony.model.BodyPart;
 import com.minelittlepony.model.capabilities.IModel;
 import com.minelittlepony.pony.data.PonyWearable;
@@ -88,7 +89,8 @@ public class ChristmasHat extends AbstractGear {
 
     @Override
     public void renderPart(float scale) {
-        GlStateManager.pushAttrib();
+        GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS);
+
         if (tint != 0) {
             Color.glColor(tint, 1);
         }
@@ -96,7 +98,7 @@ public class ChristmasHat extends AbstractGear {
         left.render(scale);
         right.render(scale);
 
-        GlStateManager.popAttrib();
+        GL11.glPopAttrib();
     }
 
 }

src/main/java/com/minelittlepony/render/layer/LayerGear.java

@@ -86,6 +86,6 @@ public class LayerGear<T extends EntityLivingBase> extends AbstractPonyLayer<T>
         gear.setRotationAndAngles(model.isGoingFast(), move, swing, model.getWobbleAmount(), ticks);
         gear.renderPart(scale);
 
-        GlStateManager.popAttrib();
+        GL11.glPopAttrib();
     }
 }