What is required for shaders?
I made it to work with gles 2.0. Don't know how that will mirror to desktop side. I used FBO and custom alpha test shader + alpha eraser. Becouse gles 1.1 do not support FBO:s without extensions the fbo helper class do not support them without 2.0.
Quick fix would be using screenutils screenshot as FBO. Little hacky, ugly and slow but least it should work. Alpha test (if >0.25 then 0.4)should be doable with clever fixed pipeline usage and eraser would be just one big black quad with transparency.
Ra4king: there are doors at bottom. Dig to there.