do u always post everything with shaders
? i don't know how to write shaders either. no shaders done in that picture above. I just took the original texture and rendered light onto it and a bit of bump map effect using Gimp. you can do the same thing photoshop as well.
thats just the modified texture applied to a block
you don't need shaders to make your textures and levels look good.
(added)
here is the 3 differnt textures with the light rendered on them used above
typicaly its not good to do for a first person sort of game because it can make the textures appear realy pixelated when right up close, Unless you do the light rendering on a big image then scale down the image afterwards.