diff --git a/src/components/ViewerControls.tsx b/src/components/ViewerControls.tsx
index dfc2695..a70a402 100644
--- a/src/components/ViewerControls.tsx
+++ b/src/components/ViewerControls.tsx
@@ -1,12 +1,30 @@
-import { Eye, Grid3X3, Ruler, Trash2, Camera } from 'lucide-react';
+import { Eye, Grid3X3, Ruler, Trash2, Camera, LayoutGrid, Palette } from 'lucide-react';
 import { Slider } from '@/components/ui/slider';
 import { Button } from '@/components/ui/button';
+import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
 import { useModelStore } from '@/stores/useModelStore';
 import { useCallback } from 'react';
 import { toast } from 'sonner';
 
+const WIRE_COLORS = [
+  { label: 'Cinza', value: '#8899aa' },
+  { label: 'Vermelho', value: '#ef4444' },
+  { label: 'Verde', value: '#22c55e' },
+  { label: 'Azul', value: '#3b82f6' },
+  { label: 'Amarelo', value: '#eab308' },
+  { label: 'Laranja', value: '#f97316' },
+  { label: 'Branco', value: '#e2e8f0' },
+];
+
 export function ViewerControls() {
-  const { opacity, setOpacity, renderMode, setRenderMode, measureMode, setMeasureMode, measurements, clearMeasurements, measurePoints, addScreenshot } = useModelStore();
+  const {
+    opacity, setOpacity, renderMode, setRenderMode,
+    measureMode, setMeasureMode, measurements, clearMeasurements,
+    measurePoints, addScreenshot,
+    showGrid, setShowGrid,
+    wireframeColor, setWireframeColor,
+    wireframeThickness, setWireframeThickness,
+  } = useModelStore();
 
   const handleScreenshot = useCallback(() => {
     const canvas = document.querySelector('canvas');
@@ -20,7 +38,7 @@ export function ViewerControls() {
   }, [addScreenshot]);
 
   return (
-    <div className="absolute bottom-4 left-4 z-10 flex items-end gap-3">
+    <div className="absolute bottom-4 left-4 z-10 flex items-end gap-3 flex-wrap">
       {/* Opacity slider */}
       <div className="rounded-lg border bg-card/90 backdrop-blur-sm p-3 shadow-lg w-56">
         <div className="flex items-center justify-between mb-2">
@@ -39,6 +57,17 @@ export function ViewerControls() {
         />
       </div>
 
+      {/* Grid toggle */}
+      <Button
+        variant={showGrid ? 'default' : 'outline'}
+        size="sm"
+        className="gap-2 h-9"
+        onClick={() => setShowGrid(!showGrid)}
+      >
+        <LayoutGrid className="h-3.5 w-3.5" />
+        <span className="font-mono text-xs">Grid</span>
+      </Button>
+
       {/* Render mode toggle */}
       <Button
         variant={renderMode === 'wireframe' ? 'default' : 'outline'}
@@ -52,6 +81,47 @@ export function ViewerControls() {
         </span>
       </Button>
 
+      {/* Wireframe settings popover */}
+      {renderMode === 'wireframe' && (
+        <Popover>
+          <PopoverTrigger asChild>
+            <Button variant="outline" size="sm" className="gap-2 h-9">
+              <Palette className="h-3.5 w-3.5" />
+              <div className="h-3 w-3 rounded-full border border-muted-foreground/30" style={{ backgroundColor: wireframeColor }} />
+            </Button>
+          </PopoverTrigger>
+          <PopoverContent className="w-56 space-y-3" side="top" align="start">
+            <div>
+              <span className="font-mono text-xs text-muted-foreground">Cor do Wireframe</span>
+              <div className="mt-2 flex flex-wrap gap-2">
+                {WIRE_COLORS.map((c) => (
+                  <button
+                    key={c.value}
+                    className={`h-6 w-6 rounded-full border-2 transition-all ${wireframeColor === c.value ? 'border-primary scale-110' : 'border-muted-foreground/30'}`}
+                    style={{ backgroundColor: c.value }}
+                    onClick={() => setWireframeColor(c.value)}
+                    title={c.label}
+                  />
+                ))}
+              </div>
+            </div>
+            <div>
+              <div className="flex items-center justify-between mb-1">
+                <span className="font-mono text-xs text-muted-foreground">Espessura</span>
+                <span className="font-mono text-xs text-foreground">{wireframeThickness.toFixed(1)}</span>
+              </div>
+              <Slider
+                value={[wireframeThickness]}
+                min={0.5}
+                max={5}
+                step={0.5}
+                onValueChange={([v]) => setWireframeThickness(v)}
+              />
+            </div>
+          </PopoverContent>
+        </Popover>
+      )}
+
       {/* Measure tool */}
       <div className="flex items-end gap-1.5">
         <Button
diff --git a/src/components/three/ModelViewer.tsx b/src/components/three/ModelViewer.tsx
index 5fe7d93..62b885a 100644
--- a/src/components/three/ModelViewer.tsx
+++ b/src/components/three/ModelViewer.tsx
@@ -25,6 +25,8 @@ function GLBModel({ url }: { url: string }) {
   const ref = useRef<THREE.Group>(null);
   const opacity = useModelStore((s) => s.opacity);
   const renderMode = useModelStore((s) => s.renderMode);
+  const wireframeColor = useModelStore((s) => s.wireframeColor);
+  const wireframeThickness = useModelStore((s) => s.wireframeThickness);
   const checklist = useModelStore((s) => s.checklist);
   const fineTuning = useModelStore((s) => s.fineTuning);
 
@@ -54,8 +56,14 @@ function GLBModel({ url }: { url: string }) {
             mat.transparent = opacity < 1;
             mat.opacity = opacity;
             mat.wireframe = renderMode === 'wireframe';
+            if (renderMode === 'wireframe') {
+              mat.wireframeLinewidth = wireframeThickness;
+            }
             mat.needsUpdate = true;
-            if (hasRejected) {
+            mat.needsUpdate = true;
+            if (renderMode === 'wireframe') {
+              mat.color.set(wireframeColor);
+            } else if (hasRejected) {
               mat.color.setHSL(0, 0.7, 0.5);
             } else if (allApproved) {
               mat.color.setHSL(0.38, 0.7, 0.45);
@@ -66,7 +74,7 @@ function GLBModel({ url }: { url: string }) {
         });
       }
     });
-  }, [scene, opacity, renderMode, checklist]);
+  }, [scene, opacity, renderMode, checklist, wireframeColor, wireframeThickness]);
 
   const rotYRad = (fineTuning.rotY * Math.PI) / 180;
 
@@ -188,6 +196,24 @@ function MeasureClickHandler() {
   return null;
 }
 
+function GridLayer() {
+  const showGrid = useModelStore((s) => s.showGrid);
+  if (!showGrid) return null;
+  return (
+    <Grid
+      infiniteGrid
+      cellSize={0.01}
+      sectionSize={0.1}
+      cellThickness={0.5}
+      sectionThickness={1}
+      cellColor="#334155"
+      sectionColor="#475569"
+      fadeDistance={5}
+      fadeStrength={1}
+    />
+  );
+}
+
 export function ModelViewerCanvas({ url }: ModelViewerProps) {
   return (
     <Canvas
@@ -212,17 +238,7 @@ export function ModelViewerCanvas({ url }: ModelViewerProps) {
       <MeasurementOverlay />
       <MeasureClickHandler />
 
-      <Grid
-        infiniteGrid
-        cellSize={0.01}
-        sectionSize={0.1}
-        cellThickness={0.5}
-        sectionThickness={1}
-        cellColor="#334155"
-        sectionColor="#475569"
-        fadeDistance={5}
-        fadeStrength={1}
-      />
+      <GridLayer />
 
       <OrbitControls
         makeDefault
diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index 89017f6..2286eee 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -68,6 +68,15 @@ interface ModelStore {
   renderMode: RenderMode;
   setRenderMode: (mode: RenderMode) => void;
 
+  showGrid: boolean;
+  setShowGrid: (show: boolean) => void;
+
+  wireframeColor: string;
+  setWireframeColor: (color: string) => void;
+
+  wireframeThickness: number;
+  setWireframeThickness: (t: number) => void;
+
   checklist: ChecklistItem[];
   setChecklistItemStatus: (id: string, status: 'approved' | 'rejected') => void;
   setChecklistItemNote: (id: string, note: string) => void;
@@ -113,6 +122,15 @@ export const useModelStore = create<ModelStore>((set) => ({
   renderMode: 'solid',
   setRenderMode: (renderMode) => set({ renderMode }),
 
+  showGrid: true,
+  setShowGrid: (showGrid) => set({ showGrid }),
+
+  wireframeColor: '#8899aa',
+  setWireframeColor: (wireframeColor) => set({ wireframeColor }),
+
+  wireframeThickness: 1,
+  setWireframeThickness: (wireframeThickness) => set({ wireframeThickness }),
+
   checklist: defaultChecklist.map(i => ({ ...i })),
   setChecklistItemStatus: (id, status) => set((state) => ({
     checklist: state.checklist.map(item =>