Yep. I've made my own panoramic skies and tiling ground textures which are in a number of my products at Hivewire.

Now, IIRC the Construct is mapped to take 4:1 images on the Background mat zone, so you can crop the sky from any equirectangular 2:1 panoramic image, add it to that zone and it'll render ok. 8k would be the absolute minimum resolution I'd recommend though. Stick tiling textures on the Ground mat zone, add an infinite light with 0.5 shadow blur, fill the scene with props and Superfly will deliver good results.

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