Symmetrical perlin noise

Questions & Answers
1

Hi all!
I have problem with a perlin noise. It generates strange symmetrical shapes:

65645-sva66my1.jpg
65645-sva66my1.jpg1600×900 183 KB

My code:

float landscape = Mathf.PerlinNoise(settings.lanscapeXScale * x * settings.sizeOfBlock + settings.landscapeSeed, settings.landscapeZScale * z * settings.sizeOfBlock + settings.landscapeSeed)*settings.landscapeInfluence;
if (settings.mountainsFrom < landscape / settings.landscapeInfluence)
landscape = 1.0f;
float height = Mathf.PerlinNoise(settings.heightXScale*landscape * x * settings.sizeOfBlock + settings.heightSeed, settings.heightZScale*landscape * z * settings.sizeOfBlock + settings.heightSeed);
2

Perlin noise is symmetrical for positive and negative values. Solution was to add huge number to coordinates of perlin noise.