Hertz van Rental
We're supposed to post photos?
if you light from both sides your gonna lose alot of the texture...
Not at all. You just move one light slightly further away so you get a slightly brighter light down one side.
It's a bit of a balancing act because you have to get enough shadow to give texture without it getting harsh - or one side of the canvas being way lighter than the other.
Outside with North light you can angle the painting. 45 degrees to the sky to get pretty flat light. As you move the canvas nearer the vertical you get shadows. Just remember to ensure that the camera is always 90 degrees to the canvas.
But if you start off with 'flat' light you are working from ground zero. Use it as a base for experiment until you find something that works. At the very least you will still have something useable.