The Ender Portal seen from below is transparent

Put the summary of the bug you here

• What I expected to happen was ...: *
  Looking under the Ender Portal to see the same texture view from above

• What really happened was ...: *
  Looking under the Ender Portal see transparent

• How to play: *
  1. Create an Ender Portal
  2. Going under the Ender Portal and watch vesrso portal