Add a column or measure that contains base64 image data to this field. Each category that has valid image data in this field will display the image on its slice, but categories with empty rows in this field will simply remain like before.
Image data in the Slice Image field must be encoded to base64 as Data URI (each string must start with data:image/[format];base64,). This can be done using free online tools. By converting the image data to base64 strings, they can be stored in the data table as text, which means that the visual can show images without requiring access to external resources (which is a requirement for Power BI certified visuals, including Pie PRO).
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