Hey @thehomme,
That’s a good question, the map range node is one that the majority of people struggle to understand straight away.
The from min and from max values are the input values that will be affected.
In the case of the 2nd map range node, the input (output from the 1st map range) is 0 to 1 …
setting the from min to 0 and the from max to 1, means it will change the full range of the input value.
If we set the from min to say, 0.2 and the from max to say, 0.8, then only the values between this range (0.2 to 0.8) will be affected.
It’s seems quite complex to understand what is happening with the map range node, but it is really quite simple.
Take a look at this thread for more discussion.
There is also a bonus-understanding-the-map-range-node lesson at the end of this chapter.
