The hexagon pattern.
Mathematically, the set crackle(p)=0 is a 3D Voronoi diagram of a field of semi random points and crackle(p) < 0 is the distance from the set along the shortest path (a Voronoi diagram is the locus of points equidistant from their two nearest neighbors from a set of disjoint points, like the membranes in suds are to the centers of the bubbles).
The crackle pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
When used as a normal pattern, dents uses a specialized normal perturbation function. This means that the dents pattern cannot be used with normal map, slope map or wave type modifiers in a normal statement.
When used as a pigment pattern or texture pattern, the dents pattern is similar to normal dents but is not identical as are most normals when compared to pigments. When used in pigment or texture statements the dents pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map and texture_map.
where VECTOR is a vector pointing in the direction that the colors blend. For example
produces a series of smooth bands of color that look like layers of colors next to each other. Points at x=0 are the first color in the color map. As the x location increases it smoothly turns to the last color at x=1. Then it starts over with the first again and gradually turns into the last color at x=2. The pattern reverses for negative values of x. Using gradient y or gradient z makes the colors blend along the y- or z-axis. Any vector may be used but x, y and z are most common.
As a normal pattern, gradient generates a saw-tooth or ramped wave appearance. The syntax is
where the VECTOR giving the orientation is a required parameter but the BUMP_FLOAT bump size which follows is optional.
The pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
As a normal pattern it creates an extremely bumpy surface that looks like a gravel driveway or rough stone.
The pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
The three colors will repeat the hexagonal pattern with hexagon COLOR_1 centered at the origin, COLOR_2 in the +z-direction and COLOR_3 to either side. Each side of the hexagon is one unit long. The hexagonal rods of color extend infinitely in the +y- and -y-directions. If no colors are specified then default blue, green and red colors are used.
You may also use pigment statements in place of the colors. For example:
When used with normals, the syntax is
Where BUMP_FLOAT is an optional bump size float value. You may also use full normal statements. For example:
When used with textures, the syntax is...
This is a block pattern which cannot use wave types, color map, or slope map modifiers.
The pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
The value passed to the color map is computed by the formula:
When used as a normal pattern, the syntax is...
where the required integer ITER value is optionally followed by a float bump size.
The pattern extends infinitely in the z-direction similar to a planar image map. The pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
This blends from yellow to cyan and then it abruptly changes back to yellow and repeats. However replacing gradient x with marble smoothly blends from yellow to cyan as the x coordinate goes from 0.0 to 0.5 and then smoothly blends back from cyan to yellow by x=1.0.
Earlier versions of POV-Ray did not allow you to change wave types. Now that wave types can be changed for most any pattern, the distinction between marble and gradient x is only a matter of default wave types.
The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
The pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
When used as a normal pattern it uses a specialized normal perturbation function. This means that the quilted pattern cannot be used with normal map, slope map or wave type modifiers in a normal statement.
When used as a pigment pattern or texture pattern, the quilted pattern is similar to normal quilted but is not identical as are most normals when compared to pigments. When used in pigment or texture statements the quilted pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map and texture_map.
The two parameters control0 and control1 are used to adjust the curvature of the seam or gouge area between the quilts. The syntax is:
The values should generally be kept to around the 0.0 to 1.0 range. The default value is 1.0 if none is specified. Think of this gouge between the tiles in cross-section as a sloped line.
This straight slope can be made to curve by adjusting the two control values. The control values adjust the slope at the top and bottom of the curve. A control values of 0 at both ends will give a linear slope, as shown above, yielding a hard edge. A control value of 1 at both ends will give an "s" shaped curve, resulting in a softer, more rounded edge.
The pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
Usually the ripples from any given center are about 1 unit apart. The frequency keyword changes the spacing between ripples. The phase keyword can be used to move the ripples outwards for realistic animation.
The number of ripple centers can be changed with the global parameter global_settings { number_of_waves FLOAT } somewhere in the scene. This affects the entire scene. You cannot change the number of wave centers on individual patterns. See section "Number_Of_Waves" for details.
When used as a normal pattern, ripples uses a specialized normal perturbation function. This means that the ripples pattern cannot be used with normal map, slope map or wave type modifiers in a normal statement.
When used in pigment or texture statements the ripples pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map and texture_map.
The NUMBER_OF_ARMS value determines how may arms are winding around the y-axis.
The pattern uses the triangle_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
The pattern uses the triangle_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.
Usually the waves from any given center are about 1 unit apart. The frequency keyword changes the spacing between waves. The phase keyword can be used to move the waves outwards for realistic animation.
The number of ripple centers can be changed with the global parameter global_settings { number_of_waves FLOAT } somewhere in the scene. This affects the entire scene. You cannot change the number of wave centers on individual patterns. See section "Number_Of_Waves" for details.
When used as a normal pattern, waves uses a specialized normal perturbation function. This means that the waves pattern cannot be used with normal map, slope map or wave type modifiers in a normal statement.
When used in pigment or texture statements the waves pattern uses the ramp_wave wave type by default but may use any wave type. The pattern may be used with color_map, pigment_map and texture_map.
Unlike most patterns, the wood pattern uses the triangle_wave wave type by default. This means that like marble, wood uses color map values 0.0 to 1.0 then repeats the colors in reverse order from 1.0 to 0.0. However you may use any wave type. The pattern may be used with color_map, pigment_map, normal_map, slope_map and texture_map.