- Program basics
- Procedural terrain generation
- Brush tools
- Texturing
- Environment configuration
- Terrain exporting
- Tips & tricks

Raiseland has some advanced procedural parameters that are a little more difficult to understand. However, they can produce very interesting features. There are two "advanced" functions: the PDF and the noise multiplier.

The Probability Density Function (PDF) controls terrain uniformity. Press the PDF button to open a new menu. You will see many bars, each bar represents the probability of a point to be in that height level. The sum of all bars must be 100%, if this condition is not satisfied when you press accept, Raiseland will divide each bar by the total to satisfy the condition.

Unlike most controls, PDF is only applied after
pressing *Accept* or *Apply*. However,
you can activate an auto apply funciton by switching on
*Auto Apply*.

The noise multiplier function allows to multiply a target noise by an origin noise. The origin noise must be set before the target noise.

The origin noise is selected by the *Noise ID*
selector. If *None* is selected, the noise
multiplier function is disabled, and all multiplier
parameters are ignored.

Some parameters control this multiplication:

- Target. When the original noise value is close to this target noise value, the result value will be maximized.
- Width. Controls how much "close" means in the previous statement.
- Alpha. Controls how much this multiplication feature will affect the result. The maximum alpha value is 1, if the alpha value is 0, the multiplication feature will be ignored.
- Blending. You can set a "blending zone" to achieve smooth results.

Different PDFs.

Different multiplier target values.

Different multiplier widths.

Different multiplier alpha values: 0.0, 0.5, 1.0.

Different multiplier blendings: low, medium high.