diff --git a/notes.md b/notes.md
index ac42732a..ba5b0e1e 100644
--- a/notes.md
+++ b/notes.md
@@ -14,6 +14,7 @@
 * `P` do not move (average) endpoints connected to long lines in decimate
 * `P` explore widget vertex reloading / replacing (Onshape) (issue #48)
 * `P` faster ray intersect https://github.com/gkjohnson/three-mesh-bvh/
+* `P` try material clipping planes for slice range selection
 
 * `F` edit in Mesh:Tool
 * `F` custom device vars for profiles / ranges / gcode
diff --git a/src/kiri-dev/fdm/Anycubic.Kobra b/src/kiri-dev/fdm/Anycubic.Kobra
new file mode 100644
index 00000000..8d727d1d
--- /dev/null
+++ b/src/kiri-dev/fdm/Anycubic.Kobra
@@ -0,0 +1,83 @@
+{
+    "noclone": false,
+    "mode": "FDM",
+    "internal": 0,
+    "bedHeight": 2.5,
+    "bedWidth": 222,
+    "bedDepth": 222,
+    "bedRound": false,
+    "bedBelt": false,
+    "resolutionX": 1600,
+    "resolutionY": 900,
+    "maxHeight": 222,
+    "originCenter": false,
+    "extrudeAbs": false,
+    "gcodeFan": [
+        "M106 S{fan_speed}"
+    ],
+    "gcodeTrack": [
+        "M117 {progress}% layer {layer} / {layers}"
+    ],
+    "gcodeLayer": [],
+    "gcodePre": [
+        "M107                         ; turn off filament cooling fan",
+        "M104 S{temp} T0              ; set extruder temperature",
+        "M140 S{bed_temp} T0          ; set bed temperature",
+        "G90                          ; set absolute positioning mode",
+        "M83                          ; set relative positioning for extruder",
+        "G28                          ; home axes",
+        "G1 F3000                     ; set default move speed",
+        "G1 Z1 F6000                  ; pause above the bed",
+        "M190 S{bed_temp} T0          ; wait for bed to reach target temp",
+        "M109 S{temp} T0              ; wait for extruder to reach target temp",
+        "G92 E0                       ; set extruder position to 0"
+    ],
+    "gcodePost": [
+        "M107                ; turn off filament cooling fan",
+        "M104 S0 T0          ; turn off extruder",
+        "M140 S0 T0          ; turn off bed",
+        "G91                 ; relative movement",
+        "G1 Z10 F1200        ; drop bed 10mm",
+        "G90                 ; absolute positioning",
+        "G28 X0 Y0           ; home XY axes",
+        "M84                 ; disable stepper motors"
+    ],
+    "gcodeExt": [],
+    "gcodeInt": [],
+    "gcodeProc": "",
+    "gcodePause": [],
+    "gcodeDwell": [],
+    "gcodeSpindle": [],
+    "gcodeChange": [],
+    "gcodeFExt": "gcode",
+    "gcodeSpace": true,
+    "gcodeStrip": false,
+    "gcodeLaserOn": [],
+    "gcodeLaserOff": [],
+    "extruders": [
+        {
+            "extFilament": 1.75,
+            "extNozzle": 0.4,
+            "extSelect": [
+                "T0"
+            ],
+            "extDeselect": [],
+            "extOffsetX": 0,
+            "extOffsetY": 0
+        }
+    ],
+    "deviceName": "Anycubic Kobra",
+    "fwRetract": false,
+    "extras": {
+        "palette": {
+            "printer": "6c99ea036da",
+            "ping": null,
+            "feed": null,
+            "push": null,
+            "offset": null,
+            "heat": null,
+            "cool": null,
+            "press": null
+        }
+    }
+}
diff --git a/src/kiri/widget.js b/src/kiri/widget.js
index 21225274..246e80dd 100644
--- a/src/kiri/widget.js
+++ b/src/kiri/widget.js
@@ -301,13 +301,16 @@ class Widget {
         const mesh = new THREE.Mesh(
             geometry, [
             new THREE.MeshPhongMaterial({
+                side: THREE.DoubleSide,
                 color: 0xffff00,
                 specular: 0x202020,
                 shininess: 125,
                 transparent: true,
-                opacity: solid_opacity
+                opacity: solid_opacity,
+                clipIntersection: false
             }),
             new THREE.MeshPhongMaterial({
+                side: THREE.DoubleSide,
                 color: 0x0088ee,
                 specular: 0x202020,
                 shininess: 100,
@@ -318,7 +321,7 @@ class Widget {
         mesh.renderOrder = 1;
         geometry.computeVertexNormals();
         geometry.addGroup(0, Infinity, 0);
-        mesh.material[0].side = THREE.DoubleSide;
+        // mesh.material[0].side = THREE.DoubleSide;
         mesh.castShadow = true;
         mesh.receiveShadow = true;
         mesh.widget = this;
@@ -380,6 +383,15 @@ class Widget {
         return this.mesh.material[0];
     }
 
+    setZClip(from, to) {
+        let mat = this.getMaterial();
+        mat.clippingPlanes = (from >= 0 && to >= 0) ? [
+            new THREE.Plane(new THREE.Vector3(0, 1, 0), -from),
+            new THREE.Plane(new THREE.Vector3(0, -1, 0), to),
+        ] : null;
+        moto.space.refresh();
+    }
+
     isVisible() {
         return this.getMaterial().visible;
     }
diff --git a/src/moto/space.js b/src/moto/space.js
index 8b4facda..94cd9f03 100644
--- a/src/moto/space.js
+++ b/src/moto/space.js
@@ -1231,6 +1231,7 @@ gapp.register("moto.space", [], (root, exports) => {
                 preserveDrawingBuffer: true,
                 logarithmicDepthBuffer: true
             });
+            renderer.localClippingEnabled = true;
             camera = ortho ?
                 new THREE.OrthographicCamera(-100 * aspect(), 100 * aspect(), 100, -100, 0.1, 100000) :
                 new THREE.PerspectiveCamera(perspective, aspect(), 0.1, 100000);