Images are not displaying in WinPE 4

Hi.

I am having troubles displaying any images  in a WPF application that is executed under WinPE 4.0 (.Net package is installed and application runs fine).

App runs fine on normal Windows machines but no images are displayed in WinPE. At the same time Windows Form app shows images fine. Is there something you can recommend checking?

I understand that .Net installed at WinPE is limited but not to the extent that images do not work :)

Edit: I was able to use WindowsFormHost to show an image but this approach is quite limited and awkward...

Appreciate any help.