I'm working on updating the popular Ant Farm Survival map and the only problem I ran into was creating transparent bedrock. The map hasn't been updated since 1.7 and in 1.8 I think Minecraft's rendering changed so it's much harder to make transparent textures for certain blocks. I do know it's possible without modding because there are resource packs like Ultimate X-ray that make opaque blocks transparent with the use of Optifine.
I'd really like some help with this and I don't think it would be too difficult. You'd have full credit for your work and I'm sure a lot of people would be excited to see such a popular map (2 million+ downloads) updated to the current version of the game. If you're able to help, dm me and we can talk about the specifics.