Tutorial Nonspherical 3D Eyes Blender

1. Create and Rotate the Sphere In Object Mode, add a UV Sphere: Go to Add → Mesh → UV Sphere. Rotate the sphere 90 degrees on the X-axis: Press R, X, 90, then Enter. 2. Duplicate and Position a Quarter Sphere Enter Edit Mode and select 1/4 of the sphere (a quarter hemisphere facing the front). Use selection tools such as Box Select or Lasso Select to isolate this region. Duplicate the selected portion: Press Shift+D to duplicate. Rotate the duplicate 180 degrees: Press R, 180, then Enter. Position it to align with the front of the original sphere. Use the Move tool (G) to adjust if necessary. 3. Merge Vertices (Optional) To merge vertices for a seamless transition, select overlapping vertices at the edge and press M → Merge by Distance. 4. Add Materials and Adjust Normals Assign materials: With the duplicated and original portions selected, go to the Material Properties panel and assign materials as desired (e.g., sclera, iris). Enable backface culling: Go to Material Properties → Settings → enable Backface Culling. Flip normals for a transparent cornea effect: Select the outer faces of the iris and press Alt+N → Flip Normals to ensure they face outward. Do the same for the inside, flipping the normals inward for the transparent cornea effect. 5. Center the Origin and Adjust Eye Alignment Place the origin at the center of the sphere: Select the sphere, go to Object → Set Origin → Origin to Geometry. Use the 3D Cursor to ensure precise placement: Position the 3D cursor at the center of the sphere to set a reference point. Create and align an eye bone: Add a bone, align it backward by rotating it 90 degrees on the Z-axis, and center it with the eye geometry. 6. Parent and Align the Eye Bone Enter Pose Mode and check rotation: Make sure the eye bone rotates smoothly on its axis. Add a secondary control bone: Create another bone at the back of the eye using Snap to Vertex for precise alignment. Parent the eye bone to the control bone: Select the eye bone, then the control bone, press Ctrl+P → Keep Offset. 7. Set Up Bone Scaling In Pose Mode, scale the control bone to adjust the eye's shape: Scaling the bone along the desired axis will create a non-spherical eye shape. This setup allows for a stylized eye with control over rotation and shape, ideal for 2D or stylized 3D cartoon eyes. This tutorial was inspired by @Zee-zh5hq Hope that helps!