private void updateDecorations(int type, World worldIn, String entityIdentifier, double worldX, double worldZ, double rotation)
{
    int i = 1 << this.scale;
    float f = (float)(worldX - (double)this.xCenter) / (float)i;
    float f1 = (float)(worldZ - (double)this.zCenter) / (float)i;
    byte b0 = (byte)((int)((double)(f * 2.0F) + 0.5D));
    byte b1 = (byte)((int)((double)(f1 * 2.0F) + 0.5D));
    int j = 63;
    byte b2;

    if (f >= -63.0F && f1 >= -63.0F && f <= 63.0F && f1 <= 63.0F)
    {
        rotation = rotation + (rotation < 0.0D ? -8.0D : 8.0D);
        b2 = (byte)((int)(rotation * 16.0D / 360.0D));

        if (this.dimension < 0)
        {
            int k = (int)(worldIn.getWorldInfo().getWorldTime() / 10L);
            b2 = (byte)(k * k * 34187121 + k * 121 >> 15 & 15);
        }
    }
    else
    {
        if (Math.abs(f) >= 320.0F || Math.abs(f1) >= 320.0F)
        {
            this.mapDecorations.remove(entityIdentifier);
            // Added this
            for (MapData.MapInfo mapdata$mapinfo : this.playersArrayList)
            {
                mapdata$mapinfo.isDirty = true;
            }
            // Change end
            return;
        }

        type = 6;
        b2 = 0;

        if (f <= -63.0F)
        {
            b0 = -128;
        }

        if (f1 <= -63.0F)
        {
            b1 = -128;
        }

        if (f >= 63.0F)
        {
            b0 = 127;
        }

        if (f1 >= 63.0F)
        {
            b1 = 127;
        }
    }

    // Changed this
    //this.mapDecorations.put(entityIdentifier, new Vec4b((byte)type, b0, b1, b2));
    
    Vec4b newVec4b = new Vec4b((byte)type, b0, b1, b2);
    if (this.mapDecorations.containsKey(entityIdentifier)) {
        Vec4b oldVec4b = this.mapDecorations.get(entityIdentifier);
        if (oldVec4b.equals(newVec4b)) {
            return;
        }
    }
    this.mapDecorations.put(entityIdentifier, newVec4b);
    
    for (MapData.MapInfo mapdata$mapinfo : this.playersArrayList)
    {
        mapdata$mapinfo.isDirty = true;
    }
    // Change end
}

public Packet<?> getPacket(ItemStack stack)
{
    if (this.isDirty)
    {
        this.isDirty = false;
        return new SPacketMaps(stack.getMetadata(), MapData.this.scale, MapData.this.trackingPosition, MapData.this.mapDecorations.values(), MapData.this.colors, this.minX, this.minY, this.maxX + 1 - this.minX, this.maxY + 1 - this.minY);
    }
    else
    {
        // Replaced this
        //return this.tick++ % 5 == 0 ? new SPacketMaps(stack.getMetadata(), MapData.this.scale, MapData.this.trackingPosition, MapData.this.mapDecorations.values(), MapData.this.colors, 0, 0, 0, 0) : null;
        return null;
    }
}