swamp ash with black grain filler, check out Reverb and look up Madlad bass bodies, there are two nice examples listed.
Four decades ago I assembled a FrankenPJ from a Schecter ash P body and Charvel P neck. I asked for a red transparent finish, and the local techs that did the work suggested staining (or filling) the grain black. Sounded like a great idea and I was thrilled with the result. Black under red was somewhat subtle, but the grain really stood out in stage lighting. Wish I had a pic from way back then!
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