Yes, a simple solution. I don't need to create a new texture, just subdivide the surfaces I want to cover, apply the texture to each section and flip the texture on each section as needed. Should have thought of that.
Thank you Dave and Pbacot. I've been working with Sketchup for several years for hobby woodworking and it's nice to know I can get help like this.

Thanks Dave.
The sample I have is a small veneered board on which I applied a test finish. It is only 5" x 9". I would like to see how it appears on my model that has panels that are 12" by 24". I imported a photo of the small panel and set it on a 5" x 9" panel in Skp in order to keep the grain the right size. I then tried to replicate and flip the panel to create a larger bookmatched pattern. After the copying and flipping process I did get a nice bookmatched pattern but when I created a new unique texture from the larger pattern, the new texture appeared tiled instead of bookmatched when I applied it.
I may be asking for to much. I realize it would be easier to use a photo of a larger board to create the new texture but I won't have a large veneered panel until I start building the project.

Hello, I am new to the forum.
I came across this post while looking for a way to create a new material from bookmatched images. I created a new material from the image of a small section of wood board (lemon tree). After creating a material with the small image, I created a bookmatched pattern by copying and flipping the image along the red and blue axes. The result was fine. However, when I created a new material with this larger pattern and applied it to a panel the result was a tiled image of my initial small pattern. Is there a way to create a new material with a bookmatched pattern?
Thanks for the help.