Black lines along photo tiles ...

Hi,I was discussing with someone else the black lines that appear along the photo tiles made as VTP2 custom polygons. At certain distances a narrow black line appears between the junction of 2 tiles and it disappears as we come closer. I think this is related to a "mip effect". If I run the ImageTool Help window there are some options that could be related (?) to this artifact. I suggested that the sides of the VTP polygon could be made larger so that adjacent photo tiles would intersect in a way to reduce those black borders. I use a SCASM macro (based on a macro by Dick) to generate the VTP polygons:; VTPm2Custom.scm macroVTPPoly( 2 4 0 ) VTPPointXY( [ %1 * 255 + 4080 ] [ %2 * 255 + 4080 ] ) VTPPointXY( [ %1 * 255 + 4335 ] [ %2 * 255 + 4080 ] ) VTPPointXY( [ %1 * 255 + 4335 ] [ %2 * 255 + 4335 ] ) VTPPointXY( [ %1 * 255 + 4080 ] [ %2 * 255 + 4335 ] )The idea was to change it to:; VTPm2Custom.scm macroVTPPoly( 2 4 0 ) VTPPointXY( [ %1 * 255 + 4079 ] [ %2 * 255 + 4079 ] ) VTPPointXY( [ %1 * 255 + 4336 ] [ %2 * 255 + 4079 ] ) VTPPointXY( [ %1 * 255 + 4336 ] [ %2 * 255 + 4336 ] ) VTPPointXY( [ %1 * 255 + 4079 ] [ %2 * 255 + 4336 ] )The question is that FS seems to crash when loading the BGL made with the modified macro. I see no reason why! Any tips?Regards, Luis