As opposed to the prismatic letter, we just leave the letter mostly flat, and carve some kind of pattern in it:

http://cineplexus.typepad.com/.a/6a00d835795fcd69e2012877168726970c-pi
    the "flat valley" could be done using texture like this:    https://www.canadianwoodworking.com/tipstechniques/12-ways-add-texture-tools-you-already-have
https://comps.canstockphoto.com/retro-ornamental-typeface-beautiful-clipart-vector_csp34063957.jpg
https://www.redbubble.com/people/callmezeldy/works/14396747-patterned-letter-r?p=mug
https://www.pinterest.ie/pin/332914597435819360/
    wow
https://www.shutterstock.com/image-vector/zentangle-stylized-alphabet-letter-r-doodle-681882013
https://www.shutterstock.com/image-vector/zentangle-stylized-alphabet-letter-r-doodle-683315929
https://www.needlenthread.com/Images/patterns/Monograms/celtic/celtic_r_lg.gif
https://br.pinterest.com/pin/390476230177674153/

https://www.etsy.com/listing/553970090/french-rosebud-2-stencil-large-letter-r
https://www.etsy.com/listing/192551469/monogram-initial-letter-r-letter-clip
    ^^ very nice, I wish I could find more of these ^^
https://www.etsy.com/listing/526182177/r-s-digital-stencil-rs-monogram-r-s-logo



Buy some basswood here:
    - https://www.ebay.com/itm/122752495573
            qty: 2          purpose: final block
    - https://www.ebay.com/itm/121829765154
            qty: 6          purpose: practice