Index: trunk/src/hid_helper.c
===================================================================
--- trunk/src/hid_helper.c	(revision 18263)
+++ trunk/src/hid_helper.c	(revision 18264)
@@ -260,12 +260,22 @@
 			int offs, has_offs;
 			pcb_layer_type_t lyt;
 			pcb_layergrp_id_t gids[PCB_MAX_LAYERGRP];
+			pcb_virt_layer_t *vl;
 
 			if (parse_layer_type(curr, &lyt, &offs, &has_offs) != 0)
 				goto err;
 
+			vl = pcb_vlayer_get_first(lyt);
+			if (vl == NULL) {
+			
+			}
+			else {
+				int vid = vl->new_id - PCB_LYT_VIRTUAL - 1;
+				dst->vgrp_vis[vid] = 1;
+			}
+
 			pcb_message(PCB_MSG_ERROR, "layer group not found: '%s' %x offs=%d has=%d\n", curr, lyt, offs, has_offs);
-			goto err;
+/*			goto err;*/
 		}
 	}
 
@@ -291,12 +301,24 @@
 
 int pcb_cam_set_layer_group_(pcb_cam_t *cam, pcb_layergrp_id_t group, unsigned int flags)
 {
+	pcb_virt_layer_t *vl;
+
 	if (!cam->active)
 		return 0;
-	if (group == -1)
-		return 1;
-	if (!cam->grp_vis[group])
-		return 1;
+
+	vl = pcb_vlayer_get_first(flags);
+	if (vl == NULL) {
+		if (group == -1)
+			return 1;
+
+		if (!cam->grp_vis[group])
+			return 1;
+	}
+	else {
+		int vid = vl->new_id - PCB_LYT_VIRTUAL - 1;
+		return !cam->vgrp_vis[vid];
+	}
+
 	return 0;
 }
 
Index: trunk/src/hid_helper.h
===================================================================
--- trunk/src/hid_helper.h	(revision 18263)
+++ trunk/src/hid_helper.h	(revision 18264)
@@ -27,7 +27,8 @@
 	/* public */
 	const char *fn;
 	pcb_bool active;
-	int grp_vis[PCB_MAX_LAYERGRP]; /* whether a layer group should be rendered */
+	int grp_vis[PCB_MAX_LAYERGRP]; /* whether a real layer group should be rendered */
+	int vgrp_vis[PCB_VLY_end];     /* whether a virtual layer group should be rendered */
 
 	/* private/internal/cache */
 	char *inst;