Making an Eye in Cycles

Mindwatering Incorporated

Author: Abigail Black

Created: 11/20 at 07:55 PM

 

Category:
Animation
Blender

Open Blender
Delete auto-generated objects

Shift+A -> Mesh -> Sphere
Right-click -> Shade Smooth
Edit Mode -> Select all faces -> R+Y+90
Sphere now should have tips horizontal

Select first five rows of faces on Y-facing side -> drag out slightly to create cornea bulge
Go into X-ray view
Shift+D selected faces -> R+Z+180 -> drag to slightly behind surface of cornea bulge

Go to Properties -> Materials Tab
Create new Material -> name "eye-scelera"
Create new Material -> name "eye-pupil/iris"
With reverse cornea faces selected -> assign material "eye-pupil/iris"


SCELERA MATERIAL NODE TREE
Mapping 1 thread is a mask that separates the cornea from the scelera. It allows the cornea to be transparent and reveal the iris/pupil.
Mapping 2 thread is the colors of the scelera. The colors in the ColorRamp depend on the user, but the first and last must be black and white, respectively.
Noise thread controls the veins on the scelera, which includes a mask so that the bump texture doesn't include the cornea, which must be smooth.

Open Node Editor
Shift+A:
Converter -> ColorRamp x4
Input -> Texture Coordinates
Vector -> Mapping x3
Vector -> Bump
Texture -> Noise
Texture -> Voronoi
Texture -> Gradient x2
Color -> MixRGB x3
Color -> RGBCurves
Shader -> Transparent
Shader -> Mix Shader

Texture Coordinate
Object Output -> Mapping 1 Vector input
Object Output -> Mapping 2 Vector input
Object Output -> Noise Texture Vector input
Object Output -> MixRGB Color1 input

Mapping 1
- Type = Point
- Location = X -0.5, Y -0.5, Z -1.4
- Rotation = X ~70, Y ~20, Z 0
- Scale = X 1, Y 1.6, Z 1
Output -> Gradient Texture 1 input

Mapping 2
- Type = Point
- Location = X -0.5, Y -0.5, Z -1.4
- Rotation = X ~70, Y ~20, Z 0
- Scale = X 1, Y 1.6, Z 1
Output to Gradient Texture 2 input

Noise Texture
- Dropdown = 3D
- Scale = 3.6
- Detail = 15
- Roughness = .500
- Distortion = 0
Color Output -> MixRGB 1 Color2 input

Gradient Texture
- Dropdown = Spherical
Color output -> ColorRamp 1 input

Gradient Texture 2
- Dropdown = Spherical
Factor output -> ColorRamp 2 input
Factor output -> ColorRamp 4 input

MixRGB 1
- Dropdown = Linear Light
- Factor = 0.179
Color output -> Mapping 3 Vector input

ColorRamp 1
- Black = 0.336
- White = 0.386
- Dropdown = Linear
Color output -> Principled BSDF Transmission input

ColorRamp 2
- Black = 0.0
- Color 1 = 0.175
- Color 2 = 0.294
- White = 0.405
- Dropdown = B-Spline
Color output -> MixRGB 2 Color1 input

Mapping 3
- Type = Normal
- Rotation = X 0, Y 0, Z 0
- Scale = X 1, Y 4.8, Z 1
Output -> Voronoi Texture Vector input

ColorRamp 3
- Black = .609
- White = .9
- Dropdown = B-Spline
Color output -> MixRGB 1 Factor input
Color output -> RGB Curves Color input

ColorRamp 4
- White = .425
- Black = .530
- Dropdown = Linear
Color output -> Mix RGB 3 Color2 input

Mix RGB 2
- Dropdown = Overlay
- Color2 = choose a color
Color output -> Principled BSDF Base Color input

RGB Curves
- Add two points to line and make an S shape
Color output -> MixRGB 3 Color1 input

Mix RGB 3
Dropdown = Multiply
Factor = 1
Color output -> Bump Height input

Bump
- Strength = 0.05
- Distance = .1
Normal output -> Principled BSDF Normal input

Transparent
Output -> Mix Shader upper Shader input

Principled BSDF
Output -> Mix Shader lower Shader input

Mix Shader
- Factor = 1
Material Output -> Output Surface input


IRIS/PUPIL MATERIAL NODE TREE
Mapping 1 thread controls the pupil
Mapping 2 thread controls the iris

Shift+A:
Vector -> Mapping x2
Vector -> Bump
Texture -> Voronoi
Texture -> Gradient
Converter -> ColorRamp x2
Color -> MixRGB x2
Input -> Texture Coordinates

Texture Coordinates
Object output -> Mapping 1 Vector input
Object output -> Mapping 2 Vector input

Mapping 1
- Type = Point
- Location = X 0, Y -0.6, Z 0
- Rotation = X 0, Y 0, Z 0
- Scale = X 6.980, Y -0.180, Z 1.800
Output -> Gradient Texture input

Mapping 2
- Type = Normal
- Rotation = X 0, Y 0, Z 0
- Scale = X 1, Y 13.8, Z 1
Output -> Voronoi Texture Vector input

Gradient
- Dropdown = Spherical
Color output -> ColorRamp 1 input

Voronoi
- Dropdown = 3D
- Dropdown = F1
- Dropdown = Euclidean
- Scale = 17.2
- Random = 1
Distance output -> ColorRamp 2 input

ColorRamp 1
- Dropdown = Linear
- Color (pick one) = 0
- White = 0.132
- Black = .180
Color output to MixRGB Color1 input

ColorRamp2
- Color (pick one) = 0.341
- Color (pick one) = 0.624
- Color (pick one) = 0.907
Color output -> MixRGB 2 Color1 input

MixRGB 1
- Factor = 1
- Dropdown = Overlay
Output -> Principled BSDF Base Color input

MixRGB 2
- Factor = 1
- Dropdown = Multiply
Color output -> MixRGB Color2 input
Color output -> Bump Height input

Bump
- Strength = .050
- Distance = .1
Normal output -> Principled BSDF Normal input

Principled BSDF
Output -> Material Output Surface input




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