When creating a new season, no raw materials will be visible initially. You can use the 'Set Season Visibility' tool to make raw materials from previous seasons visible, which can be done individually or in bulk. Since prices in Zedonk are season-specific, you can update the costs of your raw material variants without affecting any previous seasons.
Making an existing Product visible in a season will automatically make the Raw Materials associated with that Product visible. Alternatively you can make raw materials visible here in order to create new products...
Select [Set Season Visibility] from the Raw Materials dropdown
The list will be showing all your materials from all your existing seasons.
Use filters to narrow down your search, or select the season you wish to view the visible Raw Materials
I.E. Filter to see only the materials already visible in a specific previous season
Select to make colours for this material visible in the current season
Save is automatic
Or select [Make All Visible] to make all Raw Materials on screen visible in the current season
Select [Make VISIBLE] to confirm
Save is automatic, to return to the Raw Materials list view click on Raw Materials
For prices to pull through correctly, you must ensure to have the previous season set correctly in your Season Settings
If you change ANYTHING in the Raw Material except Cost, Exchange Rate - it will carry through to ALL seasons.
For example, any changes to Supplier will automatically carry through to every season.