Another Yafaray question - image background

[VictorLincolnPine]

I'm trying to render in Yafaray with custom background images, but every time I put a background in, it renders with the image massively zoomed in, defeating the purpose of adding the image.

Is there a way to render in Yafray with the background image at a reasonable magnification? Like perhaps turning the tile-size down or something? I can't seem to find a slider or input box to change that.

For some context, I'm adding the background images via an Ambient Light set to "Image" for it's background.