When you have height map projectors next to each other, when they are displaying water, sometimes the water will block out the projections on other projectors. When looking in other directions, it looks fine. (http://imgur.com/XmSGqnr,xnhJ5ep,vlVIiwo)

I've got a volcano surrounded by water, and I'm trying to get a Height Map of it to work... resulting only in a totally empty Height Map when inserted into the Projector. Does this problem fall under the auspices of this issue report?

(This is with OpenBlocks 1.2.5)

This looks a bit strange, but unless I'm missing something it is working fine... I tried both underwater and above water and I don't see any issues... (http://imgur.com/aCaGefg,uIenVUI,cgSgycZ,XCfc3NI,8sU5ukv,2hlgK1u,IXwIFW0,gu9kn8h)

Glass is working fine, it has no transparent stuff. Try nether portal or ice (also potion particles). It's actually very hard to do transparent stuff. In this case - no good way, unfortunately. I'm not sure I can fix it without complicating it significantly.

If it's being fixed in 1.7, I can wait. The thing that really confused me is that it only messes up when looking at it in certain directions...

I'm sorry, I meant to say Ice. My mistake.
The direction thing is probably because the blocks are rendered in a certain order, and in some directions, the water is rendered after the height map, in others it's rendered first.

Unfortunately you can see this with any translucent block. Surround yourself with glass and look at the water for example. This is a Minecraft graphics issue and is not fixed until 1.7.

Forge/MCP is a long way away from 1.7 so unfortunately this bug will persist until a time that we can update to it.