Overlapping Perlin Noise

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I have a perlin noise function, and I want to use it to pick biomes for a map for my game. The problem is that biomes are determined by two factors - average precipitation and average temperature. So, I thought, I'd just make two perlin noise functions and overlap them.

The issue now is that biomes do not encompass all possible precipitation temperature combinations. For example, there is no biome with high precipitation and low temperature, as shown in this picture.

How can I still use perlin noise but never reach the areas that aren't covered by biomes?

asked 34 secs ago

Kyranstar

672

Overlapping Perlin Noise