Displacement map very grainy, how can I fix?

[qwertzdergaertner]

I created a Normal map and connected it to a displacement node, but the displaycement has a rough texture and looks to grainy what could I do?

[AgentTuron]

Hello there

The normal map (the purple one) goes into the color slot of the Normal. From there, the normal goes into the Shader normal:
https://docs.blender.org/manual/en/latest/render/shader_nodes/vector/normal_map.html

If you have a black & white map, that you can use in the bump node or the displacement node, but a purple normal map is not to be used in the Displacement node

[oo_1942 (Kim)]

The noise in the image seems to have been made into a normal map.

When you baker the normal map, reduce the noise and make it.