Sandbox Toxic

Try making the pictures bigger.
If you use imageshack, use 640x480 (for message boards)

 

Here, this should be helpful if you don't want to read the map posting rules. BTW from the pictures you have it looks like a good puzzle map. Most of the obstacles look original. You need to make a longer description and fix the pics though.
YouTube - How to Post Maps on Forge Hub

 

Search www.haloscreenshots.net works realey well for me.I will pm you a tutorio.