Hi Mplayer Users Does anyone know where I can get details about the parameters that MPlayer passes to Fragment Programs? For example: 1) the texture[] arrays don't appear to have any definition anywhere. The ARB FRAGMENT Spec (link below) has a very brief definition in a comment in an example script at the end of the spec, but it's not enough info. 2) what does "TEX" command actually do? It doesn't seem to map to any set of OpenGL commands. 3) where is the information from a customtex file made available in the Fragment Program? I expected texture[0] or perhaps fragment.textcoord[0] but example fragments like "edgedetect.fp" use both these arrays and don't get passed a customtex file. I'm not an Open GL programmer so perhaps that is the source of my lack of understanding!? I've done a fair bit of reading and most information I have gained has come from the these sources: http://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2006-June/044112.html http://oss.sgi.com/projects/ogl-sample/registry/ARB/fragment_program.txt All help is much appreciated. Regards. Paulj.