How to selectively add mountains to certain parts of my terrain?

How to selectively add mountains to certain parts of my terrain? Btw my terrain was made with an alpha mat.

Use masks!! ^^

The easiest way (to me) is by setting a Layout Generator, turning it to “Mask” and tracing lines and shapes over the areas where you want mountains.

Otherwise, but this one is a bit more complicated, you could draw a black-n-white image with the same resolution as your extent. To do so you could make bitmap output of your terrain, set it as a layer in Photoshop (or the software you prefer) and create another layer on which you can draw your white and black mask. Then you export this pic as a RAW 16 bits image and apply it as a mask in your WM chain through a File Input device.

To be noticed that using sharp edges for your mask is not advisable. =|

Edit: sorry, forgot to say that, once you’ve created your mask, you have to connect it to your “mountains device” by the “mask” input port.

Thanks a lot…but how do I change the layout to a mask?

Thanks! Helped