Template fade with int 16 bit

Unfortunately this is a known limitation of the "Fade-With-Intensity" function in 7.3.1 and earlier.

Ticking "FWI" creates an 8-bit 'virtual' Intensity parameter, and so Intensity fades for this type of fixture currently have 8-bit resolution.
We intend to resolve this limitation in a future software update.

You always get the full 16-bit resolution for choosing the colour, and so you can use the parameter values for longer fades for the time being.
In general this is only noticeable this during long fades to black