9.5.2

864 • CHAPTER 18
THE SHADERS • 865
 2D - U: 2D gradient in U from zero to one.
 2D - V: 2D gradient in V from zero to one.
 2D - Diagonal: 2D gradient diagonally in UV.
 2D - Radial: 2D gradient radially around the 0.5, 0.5 in UV.
 2D - Circular: 2D circular gradient from the center out.
 2D - Box: 2D gradient linearly from the center to each edge in U and V.
 2D - Star: 2D gradient linearly from the corners in UV.
 2D - Four Corner: 2D gradient where the rst four gradient knot colors are
used as the colors at the UV corners.
 3D - Linear: 3D gradient linearly from start point to end point.
 3D - Cylindrical: 3D gradient cylindrically around the vector dened by start
and end point of radius.
 3D - Spherical: 3D gradient spherically around the start point of radius.
Cycle
When you are editing UVs, sometimes the UVs can become much larger than the original texture.
Enable this option to tile the shader.
Start
For 3D gradients, this denes the start point of the gradient. For 3D Cylindrical, this is the start of
the center vector.
End
For 3D gradients, this denes the end point of the gradient. For 3D Cylindrical, this is the end of the
center vector.
Radius
For 3D Spherical and 3D Cylindrical, this is the radius of the gradient from the center.