CompuServe Messages

We have a client who has rendered out 3800 TGA frames complete with Aplha Data, ready to do a compositing Video Post. The problem is…Each of the TGA pics has a white background, and when composited onto another background (Via Video Post-Queue Alpha) , the white shows up in a semi transparent state resulting in the scene looking as if it is viewed through tissue paper. I have re-created this by rendering the Alpha scene in TUTORIAL 22 with a grey background (lum=180) and compositing it onto the lowdunes.GIF. The result is that the white is overlayed onto the lowdunes.GIF as semi-transparent. The alpha data appears to be correct (ie totally clear where the white background is) but the white still shows up. If you render the meshes with ALPHA SPLIT and then use the split alpha TGA as an Aplha Mask, The white background becomes completely transparent (the desired result!) Any help here as his job is almost due, and re-rendering all the frames obviously is out of the question. He wants the white background to disappear completely when composited as the Alpha data should tell it to. Thanx in Advance