Okay I have made this as easy as possible. Below will be a link to a complete 1 hour tutorial video taking you though my pencil layering processes step-by-step. This video is free on my YouTube channel and anyone can watch it.
The first sphere is a demonstration of layering with prismacolor pencils only.
The second sphere is layering with only Faber-Castell polychromos pencils.
The third is layering Polychromos over Prismacolor and finally layering Prismacolor over Polychromos.
I take you through how I get the smoothest possible look using multiple layers and at the end I demonstrate everything by using a blue rose as a practical example.
To blend I use Art Spectrums odourless solvent and a brush or tissue paper.
This is the only full tutorial I have made available for everyone and it should give you a good idea of the kind of tutorials I provide to patrons weekly. If you are interested in learning to draw realistically then consider becoming a supporter on Patreon.
Happy drawing :)