Landscape height blending

Development World Creation
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1

Hello, I wanted to mask my landscape with Height, but when I brush with a texture, the whole tile becomes transparent with it. Can someone help?

http://https://drive.google.com/file/d/1AShEXkl6BE7WTAQcD6Cip6VDixKT3Goa/view?usp=drivesdk

2

Photo: Screenshot_130.png - Google Drive