We have blood root and mayapples in the shade and the deer seem to have left them alone.

some info from google search - native plants texas deer resisitant.

information from native plant society of texas (no mention of light requirements)

NATIVE PLANT SOCIETY OF TEXAS KERRVILLE CHAPTER

hope this helps a bit

Here is a link that might be useful: lady bird johnson wildflower center ~ search with texas/shade

if you're looking for grass-like plants,
the link below mentions a few sedges (carex?)that can take quite a bit of shade and are native to texas.

Brooklyn Botanical garden ~ Easy Lawns

Here is a link that might be useful: native plant society of texas/kerrville ~ grasses

I have a home in Lago Vista, where the deer are voracious! The home is situated on a wooded hillside w/ many natives that are surviving despite the deer! I've also put in a few new plants w/ some sucess. You might try some of the following:

beautyberry
lantana
yucca
oregano
lavender
rosemary
mountain laurel
turks cap
winecup
gayfeather

Things to remember:
-plants with strong, aromatic leaves are less attractive to deer.
-sweet smelling blooms are yummy to deer (ie. roses)
-late August when natural vegetation is scarce, the deer may eat even their least favorite plants out of desperation. (Just remember, you'd be pruning this time anyway...think of them as Mother Nature's helpers!)
-smaller plants, or new growth on aromatic species may not have the mature stinky odor necessary to repel the deer.

Hill Country Plants for Shade
http://www.nativesoftexas.com/plants_for_shade_and_part_shade.htm

For Central Texas, check out the Lady Bird Johnson Wildflower NPIN website and database. It's the ultimate resource!

I grow west of Austin in scruffy limestone and caliche marl. Nasty stuff. No water to speak of. I have a shade and Part shade garden and I grow Phlox pilosa, Salvia madness, columbine, Algeratina havanense, beautyberry, alstroemeria, Texas betony many of the native sedges (cedar sedge) are good for a grassy effect. I really like Berkley sedge which isn't native to here, but it is fairly xeric. Nolina lindheimeri and Nolina texana will grow in shade. Big muhly will take some shade, but it grows long and wispy, but still nice, a different character than a sun grown plant.. Penstemon tennis, salvia gregii, salvia romeriana and salvia regla will take some shade. Agave bracetosa takes some shade. One can use evergreen sumac and aromatic sumac in shade. Even agarita will take bright shade. Frostweed and mexican oregano will like part shade.I have some wild asters that are seeding themselves. I like to use the understory trees like toothache tree, redbud, drummonds dogwood and Anacho orchid tree are an effective way to create a woodland feeling. I think that all of the above are deer resistant because I have gobs of deer and the are still with me.