Mapping a specified number to an argument in Perlin Noise space

Hello everyone,
I am very new to processing. recently, I watched The coding train’s 3d terrain generation using Pelrin noise tutorial.
I am also trying to create a terrain consisting of mountains. However, I want my mountains to have heights specified by me, and the adjoining area between mountains to have a continuous, organic slope. I am trying to use Perlin noise for the adjoining area between mountains. However, I am unable to map the height of my mountains to the Perlin noise space. Please help.

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You can combine a noise map with anything. If you apply cones to your perlin noise then you will get noisy cones. What do you want to combine them with?

You might consider watershedding / erosion