I was alerted to an artistic software application in this topic at JAlbum Forum
guymoll - album Périgord et Gers (France) avec skin Banana
As seen from the topic, I too tried out the AKVIS Sketch software and the border/frame ideas of guymoll, but rather than a white frame on a white background, I tried some variations and this tutorial is about using the canvas background option in BPP skin.
You can see a sample at Saronic Islands
When you go to a slide you will see that the BPP background merges seamlessly with the frame of the slide, giving the impression that the "watercolour" is actually painted onto the canvas. The thumbnails of course are reduced size and therefore their frame canvas is also reduced and does not match exactly with the background, but it still is acceptable to my eyes.
So here is a tutorial on how to achieve this effect, and I am using Sketch as a Plug In to Paint Shop Pro [Ver 8].
Firstly it is important to realise that once you have played around with the settings in Sketch and have saved your very own "good as Picasso" profile, you will only reproduce the same result if you apply it to an image the same size as the one you plan to use in the JAlbum.
Therefore do whatever you might normally do in your image editor [eg trim, enhance, straighten etc] but especially resize, before rendering the image in Sketch.
Here is such an image, just rendered in Sketch. I had already resized as 640 x 480 and done the PSP One Stop Enhance [Optional].

I then apply one of the Picture Frames in PSP and this one is similar to the idea of guymoll. The frame is made up of pure white pixels, which as seen blend in with the white background in the Banana skin used by Guy.

But in this exercise we want to replace the white with a canvas, and the easiest way to do that is to use the "Swatches", which are simply pre set colours/styles

We need to save the canvas as one of the swatches [# 25 in this case] and to do so we need to Open the canvas jpg file, which can be found here.

Then we save it as a "pattern" swatch

Then left click on it in the swatches to make it the Foreground and right click on the white swatch to make it the Background. Then goto this tool the Colour Replacer [might be hidden behind the Dropper].

A simple double click on the jpg adds the canvas frame in place of the white one
