Unfortunately there is no possiblity. The way CmdBkg works is like that:
There are two windows. The foreground window is the console window which displays the text. The background window displays the image and it lays behind the console window (following the position and size updates of the console window). In order to make the background even visible, the console window in the foreground must be transparent to a certain extend. But this means that also the text is getting transparent to the same degree.
You may want to have a look at the new Windows Terminal https://github.com/microsoft/terminal It supports a lot of settings and visual effects.
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