Hi,

 

Image increasing size in GUI overlay:

 

Print: http://i.prntscr.com/tD5jfDL7Rymrwx-ZZ9q03w.png

 

Code:

 

package Thirst;

import java.lang.annotation.ElementType;
import java.util.HashMap;
import java.util.Map;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.Mod.Instance;
import cpw.mods.fml.common.SidedProxy;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.event.FMLServerStartingEvent;
import cpw.mods.fml.common.eventhandler.EventPriority;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.ScaledResolution;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.ResourceLocation;
import net.minecraft.world.World;
import net.minecraftforge.client.event.RenderGameOverlayEvent;
import net.minecraftforge.common.MinecraftForge;

@Mod(modid = Main.MODID, version = Main.VERSION)
public class Main {
   
    
      public static final String MODID = "thistmod";
        public static final String VERSION = "1.0.0";
        public static final String CLIENT_PROXY = "Thirst.ClientProxy";
        public static final String COMMON_PROXY = "Thirst.CommonProxy";
        
        @Instance(MODID)
        public static Main instance;
        @SidedProxy(clientSide = CLIENT_PROXY, serverSide = COMMON_PROXY)
        public static CommonProxy proxy;
        
        @EventHandler
        public void load() {
            
        }
         
        @EventHandler
        public void preInit(FMLPreInitializationEvent event)
        {
            
        }
        @EventHandler
        public void Init(FMLInitializationEvent event)
        {
            
        }
        @EventHandler
        public void postInit(FMLPostInitializationEvent event)
        {
            //MinecraftForge.EVENT_BUS.register(new GUIRenderEventClass());
            MinecraftForge.EVENT_BUS.register(new GUIRenderEventClassd());

        }
        public static class GUIRenderEventClassd {
        @SubscribeEvent(priority = EventPriority.NORMAL)
    public void onRenderGameOverlay(RenderGameOverlayEvent event) {
        if(!event.isCancelable() && event.type == net.minecraftforge.client.event.RenderGameOverlayEvent.ElementType.EXPERIENCE) {
            Minecraft mc = Minecraft.getMinecraft();
            
            if(!mc.thePlayer.capabilities.isCreativeMode) {
                
                //int posX = (event.resolution.getScaledWidth() / 2)*20;
                //int posY = ((event.resolution.getScaledHeight() / 2)*32) + ((event.resolution.getScaledHeight() /2) *2);
                
                int posX = (event.resolution.getScaledWidth() / 2);
                int posY = (event.resolution.getScaledHeight() / 2);
                
                //GL11.glPushMatrix(); // save the current matrix
                //GL11.glScalef(0.05F, 0.05F, 0.05F); // scale the matrix
                 
                
                
                mc.renderEngine.bindTexture(new ResourceLocation("thistmod:textures/gui/Nhec.png"));
                
                mc.ingameGUI.drawTexturedModalRect(posX, posY, 64,64,112, 128);
              
                //GL11.glPopMatrix(); 
                //GL11.glPushMatrix();
                //GL11.glScalef(0.5F, 0.5F, 0.5F);
                //mc.fontRenderer.drawStringWithShadow("ATA", posX, posY, 0xFFFFFF);
                //GL11.glPopMatrix();
                
            }
        }
     
    }
        }
}

Um...ok?
Do you have a question or problem you want help with?