Hi smalll...

Where there is black in a displacement map, it gives zero displacement, and white gives maximum displacement, as determined by the value on the Poser Surface node. (I think I have this the right way round - someone please correct me if I am wrong).

Displacement uses a single (greyscale) value, so your bright red (RGB value 127,0,0) would give one-third of your maximum displacement.

So if you use red as the base colour for the Spots node you are applying one-third of your  maximum displacement value over those parts of the surface, and maximum displacement where the white is.

You might get some weird effects from this, so it's probably better to start with black as the base colour, and white to give the required displacement.

Izi

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)