I have considered that. I do sew, and if I went with linen or a loose weave fabric I could probably get the the texture I want, although probably not the interesting light filtration. But, I do have kids, and I think a white roman shade would end up looking dirty and dingy pretty fast. I like the idea of a woven wood blind because I can wipe it clean. The white panels in the other room I know I will have to wash pretty often, but I'm okay with that because I don't have to worry about cords, etc.

It just occurred to me that maybe I can make roman shades out of something stain resistant . . .

I found pictures of a few bright white woven shades this afternoon that I really liked but each time I tracked down the source they ended up being either a custom product or way out of my price range.

Not really woven but they do have texture. I think they have bright white, too.

And quite inexpensive: http://www.ikea.com/us/en/catalog/products/30314594/

I like these woven roller shades from Country Curtains. They offer different colors

https://www.countrycurtains.com/product/040547309+textured+woven+shade.do?sortby=ourPicks&refType=&from=fn&ecList=7&ecCategory=55

Order the free samples, and if you are considering room darkening/blackout, order those too. They are different colors.

I ordered cellular shades. They had a couple of shades of bright white/blue white, which were actually too blue/gray for my bright white paint (BM white). Sometimes my paint looks blue and sometimes yellow. So you really need the samples of the exact actual fabrics, preferably not in a book, so you can hold them up to the window and let the light shine through. Order all sample shades from white to cream, and try a couple of subtle patterns. They are all different and you may prefer a greige variation rather than a cream variation.

My white roller shades were actually cream. The cellular shades had a lot more white color options.

I think it's risky to try to match the white exactly. There are times when it won't match. You need the samples to decide what is acceptable with regard to variation. I have a white patterned cellular shade in the bedroom which is not the same color as the white paint, but it looks like it is close and it goes fine with the paint. Sometimes a subtle texture/pattern can make the pairing for forgiving.

Another thing to consider is will the fabric discolor over time.

Wow, I looked at Ikea but everything looked really opaque online. This picture is gorgeous! I don't know if I want roller but these are so inexpensive I could probably buy them and if I don't like it I could use the mechanism from some of the off white ones I've seen a lot of. I think I might order some samples of the off white ones and play around with them, and see if paint will stick to them at all. If I could spend $300 a window there would be loads of options, but my husband still doesn't understand why I didn't want plain old venetian blinds when we could have added them into our house for $40/window. Although, if I opt not to do the shutters in the front room, that gives me a much bigger budget to spread throughout the house.

I don't mind a little color variation, I just would prefer if they end up being more of a grey tone vs. cream to blend better with the cool white paint. I also don't mind if they don't match perfectly, I think you're right about how hard it is to match white, but if they end up darker than the walls, I don't want them to be so dark they stand out, or look dingy. I'm going to order samples now, and accept I'm not ready to order anything during the holiday sales this weekend. I think I want to get a few choices in front of me as far as color from a few different places and then I can start deciding how picky to be about style.

They are definitely light filtering. I looked at them today.

The other option is IKEA panels with lots of options

The ones below are 8.00/piece. Others have a really neat woven pattern. Definitely something to consider.