To make textures move type "/vscroll 1" on a texture, it only works in single player.

"/vscroll <x_direction> <y_direction>", to make textures scroll. (TIP: negative numbers scroll the opposite direction)

Water cannot be "bent" like cubes can.

Glass cannot be "bent" like cubes can either... but you can get the same effect if you "bend" a cube around, then use alpha material. ("/alpha", or use the F3, materials, menu)

**Alpha tip** When offline, you can use "/valpha <outside_face> <inside_face>" to set the transparency of cube faces inside alpha material. (where inside/outside_face is in the range of 0-1)

Both of these statements forgot you can use such commands in multiplayer, but only in coop-edit and with nompedit off (you'll have to use /sendmap after using v-commands). Next to that, the regular tex-commands can be stored in a map's cfg.

As somedude already stated, you can't bend glass neither any other material. However, if you specify geometry which contains the enviromental-mapped shader, you can create a very similar effect when it's inside alpha-material and lowered the texalpha (or valpha). For water, use a mapmodel or a custom shader (like raising the spec- and parallax-scale).