Here is all of the different Shading Styles I am able to do. Price heavily depends per-piece and how much detail is wanted by the Commissioner. Below are the BASE prices for each style to help gauge you what to expect. Prices listed below are based on add-on's for Illustrations.
You may request to upgrade a Flat colour to a shaded piece. The cost will be lower then the listed as there is no background.
Illustration with minimal/no shading, complex background.
[No extra cost for shading style, based on background alone.]
Hybrid of Blurred/Soft and Cell (Overlapped with a overlay to make cell look somewhat fuzzy/soft. It highlights the shading without it being true Cell-Shading and can have a somewhat realistic appearance. This is the most common shading style I use.
[$50+]
Flat shading with no blur effect. Recommended for more Cartoony styled commissions
[$30+]
Shading can be blurred or Hybrid style, made to try and react the 'feel' of old cartoons with a over-layed grainy/blurred effect over the entire drawing to look soft.
[$60+]
Flat shading with no blur effect. Has multiple layers on-top of each other to make the shading pop out more, inspired by the Pajama Sam games.
[$70+] (Depends on how many layers)