I see your point; when you put the model at the angle in those pics the sheath looks different. However in the other one it looked a bit, shall we say, peculiar.
I think if you perhaps lessened the dividing crease in the testicular part it might assist it in having a more horsey look- it's just when you have the horse in the final renders I should think you will want to have it standing up rather than upside down and a little more subtlety in that crease might help it look more horse like.
Unless you have a close up of it in glorious technicolour now LOL.
I think the sheath looks a tad oversized, as your horse is quite slight, lacking the breadth of girth, of what one would think of as a typical stallion build for example, so it might be tempting to make the sheath a little smaller, to be more in proportion. In the pic you attached the horse has much greater depth from withers to girth etc.
It really does come to something when you have to have a horse nudity warning in your thread
Can't we do the same? lol
