Here are some wood grain plywood panel samples that can be used for skinning, very nicely done … hope its useful…. <snipped for brevity>
These are very nice wood textures!
But did you know that you can make your own fairly quickly? Here's what you do: (I use PhotoShop 7, but most of what I'll bring up here will translate pretty well in other gfx apps.)
Create a new layer (we'll name it "base.")
Fill it with a sandy/light-brown color.
Duplicate that layer and call it "grain." Make sure that it is positioned above the "base" layer and is selected as the active layer.
Select a dark brown color.
Go to Filter/Noise/Add noise and set your preferences for the amount of grainy noise that suits you and click OK (it should look like a course-grain sandpaper).
Go to Filter/Blur/Motion blur and set the amount of blur so that the streaks are very long and the angle is set to 90 or 180 (horizontal or vertical); click OK (It'll look like a plank of teak wood).
Go to Filter/Distort/Wave and play with the settings to achieve the amount of wriggle that suits your taste. The "grain" layer may now resemble maple without knots
Select your Elliptic Marquee tool and set feather for about 10 pixels
Using your Elliptic Marquee tool select a large-ish ovoid area anywhere on the "grain" layer.
Go to Filter/Distort/Twirl and set the amount to your taste to create a whorl that resembles a knot.
Lather, rinse, repeat as needed.
When satisfied, merge "grain" down to "base" so that you don't have translucent areas in the grain. (The blurring in the earlier steps will stretch the "grain" layer at the edges of the canvas making the edges gradiently transparent. By merging the layers you remove the transparency.)
Ta-da! Hope this helps!