diff --git a/src/kiri/app/conf/defaults.js b/src/kiri/app/conf/defaults.js
index b4e6ed56..6bd700e4 100644
--- a/src/kiri/app/conf/defaults.js
+++ b/src/kiri/app/conf/defaults.js
@@ -604,6 +604,7 @@ export const conf = {
                 camToolInit: true,
                 camTraceDogbone: false,
                 camTraceDown: 0,
+                camTraceIgnore: false,
                 camTraceLines: false,
                 camTraceMerge: false,
                 camTraceOffOver: 0,
diff --git a/src/kiri/mode/cam/app/cl-ops.js b/src/kiri/mode/cam/app/cl-ops.js
index 9fe753cf..0e7edf71 100644
--- a/src/kiri/mode/cam/app/cl-ops.js
+++ b/src/kiri/mode/cam/app/cl-ops.js
@@ -487,6 +487,7 @@ export function createPopOps() {
         offover: 'camTraceOffOver',
         dogbone: 'camTraceDogbone',
         revbone: 'camTraceDogbone',
+        ignore: 'camTraceIgnore',
         merge: 'camTraceMerge',
         ov_topz: 0,
         ov_botz: 0,
@@ -502,6 +503,7 @@ export function createPopOps() {
         offover: UC.newInput(LANG.cc_offd_s, { title: LANG.cc_offd_l, convert: toFloat, units, show: () => env.poppedRec.offset !== "none" || env.poppedRec.mode === "clear" }),
         sep: UC.newBlank({ class: "pop-sep", modes: MODES.CAM, xshow: zDogSep }),
         thru: UC.newBoolean(LANG.cc_thru_s, undefined, { title: LANG.cc_thru_l }),
+        ignore: UC.newBoolean(LANG.co_igno_s, undefined, { title: LANG.co_igno_l, show: () => env.poppedRec.mode === 'clear' }),
         merge: UC.newBoolean(LANG.co_merg_s, undefined, { title: LANG.co_merg_l, show: () => !env.popOp.trace.rec.down }),
         dogbone: UC.newBoolean(LANG.co_dogb_s, undefined, { title: LANG.co_dogb_l, show: canDogBones }),
         revbone: UC.newBoolean(LANG.co_dogr_s, undefined, { title: LANG.co_dogr_l, show: canDogBonesRev }),
diff --git a/src/kiri/mode/cam/work/op-area.js b/src/kiri/mode/cam/work/op-area.js
index 8297d419..148671ae 100644
--- a/src/kiri/mode/cam/work/op-area.js
+++ b/src/kiri/mode/cam/work/op-area.js
@@ -191,7 +191,12 @@ class OpArea extends CamOp {
                     let outs = [];
                     let clip = [];
                     let firstOff = -(toolDiam / 2 + (op.leave_xy ?? 0));
-                    POLY.subtract([ area ], shadow, clip, undefined, undefined, 0);
+                    // remove shadow from area
+                    if (op.ignore) {
+                        clip = [ area ];
+                    } else {
+                        POLY.subtract([ area ], shadow, clip, undefined, undefined, 0);
+                    }
                     POLY.offset(clip, [ firstOff, -toolOver ], {
                         count: op.walls ? 1 : (op.steps ?? 999), outs, flat: true, z: z - zMov, ...offopt
                     });
@@ -258,7 +263,7 @@ class OpArea extends CamOp {
                 for (let z of zs) {
                     let slice = newLayer(z);
                     let layers = slice.output();
-                    let shadow = await shadowAt(z);
+                    let shadow = op.base ? state.shadow.base : await shadowAt(z);
                     let outs = [];
                     if (tr_type === 'none') {
                         // todo: move this out of the zs loop and only setZ when needed
diff --git a/src/kiri/mode/cam/work/op-outline.js b/src/kiri/mode/cam/work/op-outline.js
index 198eab31..e21dfaa2 100644
--- a/src/kiri/mode/cam/work/op-outline.js
+++ b/src/kiri/mode/cam/work/op-outline.js
@@ -25,9 +25,11 @@ class OpOutline extends CamOp {
             let areas = shadow.base.clone(true);
             ops_list.push(new OpArea(state, {
                 areas: { [widget.id]: areas.map(p => p.toArray()) },
+                base: true,
                 direction,
                 dogbones,
                 down,
+                drape: true,
                 expand: 0,
                 mode: 'trace',
                 omitinner: omitvoid,
diff --git a/src/kiri/mode/cam/work/op-trace.js b/src/kiri/mode/cam/work/op-trace.js
index 25ae2065..cbf3512e 100644
--- a/src/kiri/mode/cam/work/op-trace.js
+++ b/src/kiri/mode/cam/work/op-trace.js
@@ -12,7 +12,7 @@ class OpTrace extends CamOp {
 
     async slice(progress) {
         let { op, state } = this;
-        let { areas, direction, down, expand, follow, offover, offset, outline, mode, ov_botz, ov_topz } = op;
+        let { areas, direction, down, expand, follow, offover, offset, outline, ignore, mode, ov_botz, ov_topz } = op;
         let { plunge, rate, refine, smooth, spindle, step, steps, thru, tolerance, tool } = op;
         let trace = {
             areas,
@@ -21,6 +21,7 @@ class OpTrace extends CamOp {
             down,
             expand,
             follow,
+            ignore,
             mode: mode === 'clear' ? 'clear' : 'trace',
             outline,
             ov_botz,
diff --git a/src/kiri/mode/fdm/app/init-ui.js b/src/kiri/mode/fdm/app/init-ui.js
index 00837bd5..d7d4642f 100644
--- a/src/kiri/mode/fdm/app/init-ui.js
+++ b/src/kiri/mode/fdm/app/init-ui.js
@@ -380,6 +380,8 @@ function supportDone() {
         // Use popVisualState to restore original material
         w.popVisualState('paint');
     });
+    api.conf.save();
+    api.space.save();
 }
 
 // manual supports clear
diff --git a/web/kiri/lang/en.js b/web/kiri/lang/en.js
index a74666b9..5c3fdfc3 100644
--- a/web/kiri/lang/en.js
+++ b/web/kiri/lang/en.js
@@ -549,6 +549,8 @@ self.lang['en-us'] = {
     co_menu:        "outline",
     co_merg_s:      "merge overlap",
     co_merg_l:      ["merge overlapping lines to prevent overcutting into adjacent solids"],
+    co_igno_s:      "ignore part",
+    co_igno_l:      ["do not constrain cutting areas","to part boundaries. this allows","using the part as negative space"],
     co_dogb_s:      "dogbones",
     co_dogb_l:      ["insert dogbone cuts","into inside corners"],
     co_dogr_s:      "reverse bones",