Realistically change patterns on product images

I will send images of 2 stacks of towel with different designs in different colours. I need these combined basically - it will be approximately 24 images to create.

For example - with these 2 images I need a new image of a stack of towels created with 1 of each towel type in the bale. So 1 circles small towel, 1 plain small towel, 1 circles big towel, 1 plain big towel.

They need to look real and not distorted in any way with realistic shadows.

See example images for one of the sets needed.