De naam Schmeerlap heeft toch wel iets Nederlands. Sorry, back to English; I still have the same problem opening any multishader, but the rendering is ok, at least at 1600 px wide. Virtual Memory use is only 1.5GB, so I am pretty confident it will work at 4500 px wide, which I need for the final work.
I might have changed a shader's name within the multishader, by mistake, in which case (I later found out with another project) it cannot find the default shader. Perhaps in this case, TG just crashes when unable to read. If it won't interfere with the render, I can live with this problem, although I remain curious why it happens. After finishing the project I might get rid of some farms in a copy tgd to see what happens.
I have made these objects in XFrog (a cube and some planes; they are small in the image, so I kept them very simple), changed the OBJ's to TGO's in TG, and individually these TGO's work perfectly.
Anyway, I have included a picture for the curious. It's the Dutch town of Zutphen around 1000 AD. Needs some afterwork in PS, because not all can be done in TG. This is all TG except for the smoke over the city.
Dune