[TYPO3-project-formidable] Display images in renderlet:LISTER

[Ian Solo]

Hello,
how it possible to display images in a renderlet:LISTER?

I tried:
<column name="image" type="renderlet:FILE" listHeader="Image" />
but in the image column I see the text "array".

I tried also renderlet:IMAGE but it doesn't work.
With renderlet:TEXT it shows correctly the filename.

I searched everywhere but I can't find an example.

Thank you in advance for you help!
ian