Curious I have in my layout some metapost code to redefine the plan gridlines, used without apparent problem for perhaps 10 years. It includes a colour specification. withcolor 0.1black+0.5white; Mostly they come out like this, very light grey. This example is exported using colour-model cmyk, but most of the time using colour-model rgb it looks exactly the same, in my current project (only variables are colour map-fg, some map previews on or off and the colour model). For some reason, in my current project, if I use colour-model rgb for a particular output variant, I get a much darker gridline, as below. Other variants with rgb, the colour of the gridline matches the first example. Any hints as to why the difference? I might have expected this to occur with the new cmyk colour model, but it does not. So far it has only happened with in a single specific case when using the rgb colour model. I'll watch for more cases. Bruce
