Index: trunk/src/draw_everything.c
===================================================================
--- trunk/src/draw_everything.c	(revision 34334)
+++ trunk/src/draw_everything.c	(revision 34335)
@@ -53,6 +53,8 @@
 	/* when scripted: per call args */
 	int argc;
 	long argv[DRW_MAX_ARG];
+
+	unsigned enable_silk_invis_clr:1;
 } draw_everything_t;
 
 
@@ -113,7 +115,7 @@
 /* temporarily change the color of the other-side silk */
 static int drw_silk_tune_color(pcb_draw_info_t *info, draw_everything_t *de)
 {
-	if (de->backsilk_grp != NULL) {
+	if (de->enable_silk_invis_clr && (de->backsilk_grp != NULL)) {
 		rnd_cardinal_t n;
 		for(n = 0; n < de->backsilk_grp->len; n++) {
 			pcb_layer_t *ly = pcb_get_layer(PCB->Data, de->backsilk_grp->lid[n]);
@@ -129,7 +131,7 @@
 /* set back the color of the other-side silk */
 static int drw_silk_restore_color(pcb_draw_info_t *info, draw_everything_t *de)
 {
-	if (de->backsilk_grp != NULL) {
+	if (de->enable_silk_invis_clr && (de->backsilk_grp != NULL)) {
 		rnd_cardinal_t n;
 		for(n = 0; n < de->backsilk_grp->len; n++) {
 			pcb_layer_t *ly = pcb_get_layer(PCB->Data, de->backsilk_grp->lid[n]);
@@ -490,6 +492,12 @@
 	de.backsilk_gid = ((!info->xform->show_solder_side) ? pcb_layergrp_get_bottom_silk() : pcb_layergrp_get_top_silk());
 	de.backsilk_grp = pcb_get_layergrp(PCB, de.backsilk_gid);
 
+	de.enable_silk_invis_clr = info->xform->enable_silk_invis_clr;
+
+	/* ugly special case for compatibility: far-side silk is rendered grey on GUI... */
+	if ((rnd_render == rnd_gui) && rnd_render->gui)
+		de.enable_silk_invis_clr = 1;
+
 	if (draw_everything_scripted(info, &de) < 0) {
 		if (!draw_everything_error) {
 			rnd_message(RND_MSG_ERROR, "render_script: runtime error; falling back to hardwired C rendering\n");
Index: trunk/src/obj_common.h
===================================================================
--- trunk/src/obj_common.h	(revision 34334)
+++ trunk/src/obj_common.h	(revision 34335)
@@ -111,6 +111,7 @@
 	unsigned show_solder_side:1;    /* GUI */
 	unsigned invis_other_groups:1;  /* GUI */
 	unsigned black_current_group:1; /* GUI */
+	unsigned enable_silk_invis_clr:1;  /* when 1, enable drawing other-side silk with the 'inivisible color' */
 	/* WARNING: After adding new fields, make sure to update pcb_xform_add() and pcb_xform_is_nop() below */
 };
 
@@ -135,6 +136,7 @@
 		__dst__->show_solder_side |= __src__->show_solder_side; \
 		__dst__->invis_other_groups |= __src__->invis_other_groups; \
 		__dst__->black_current_group |= __src__->black_current_group; \
+		__dst__->enable_silk_invis_clr |= __src__->enable_silk_invis_clr; \
 	} while(0)
 #define pcb_xform_is_nop(src) (\
 	((src)->bloat == 0) && \
@@ -150,7 +152,8 @@
 	((src)->add_gui_xform == 0) && \
 	((src)->show_solder_side == 0) && \
 	((src)->invis_other_groups == 0) && \
-	((src)->black_current_group == 0) \
+	((src)->black_current_group == 0) && \
+	((src)->enable_silk_invis_clr == 0) \
 	)
 
 /* Returns true if overlay drawing should be omitted */