I worked on some fantasy scary trees in Illustrator. Below is a screen shot of four I made. I experimented because I wanted to get my head round what tools I could use to design my book cover and of which would be relevant. These below were pretty simple to make using the knowledge I already had.
Below here is my brushes panel. I made a brush by taking the pen tool (P) and drawing a simple slim triangle. I then created several layers and named them according to their colour. I separated the triangle into 4 different parts each with a different shade of brown to create texture and realism.
So then I had a triangle with different colours in. I grouped them all then dragged them to my brushes palette to create an Art brush. From here I could create any shape using my brown triangle as the brush. The idea was that this would be my tree trunk. The branches were simply used from the same brush for the tree trunk I made, just made a lot smaller to maintain proportion.
Here is a colour palette of the different browns I used for my tree.
Below is my brushes panel with a green leaf shape. I designed this using the ellipse tool (L) and pathfinder. Again I used a few of the same colour, this case being green to visually look more natural. I used this on my branches as a SCATTER, brush but even after changing the spacing settings, size etc It did not fit into my design. So, I came up with a better idea using watercolour brushes. The one I used is the second one from the bottom in tis image.
Below are my final four trees. I used the pencil tool (N) to scribble just above the branches then applied different watercolour brushes that suited. Changing the size of the leaves depending on how high/short the branches were etc. I set the transparency level to 60% because they don't need to stand out that much. I used a varied colour palette of greens, almost going into a very dark yellow in some of them to create a kind of mysterious/odd effect. This is because these tree designs are based on the scene the 'Wild Wood'.
Below are 3 more trees that I just copied. I changed the size of them and made set the transparency level to 40%. I placed them behind the originals to create more of a landscape. Like a forrest. The screenshot below is placed over 2 blue lines which are guides and represent the spine of the book. I grouped these trees below so I had a 7 trees as one object.
Again below here the screenshot is set over the whole book cover but if I do choose to use these tree designs in my final idea they will be laid out differently. Possibly just covering the front cover. I just simply multiplied the above image of the 7 trees x8 to get 56 trees in total to create a landscape. Again I re-sized them, changed their opacity levels and sent some of them to the back (shift + apple + open bracket). These are not finished, just how far I have got. Difficulties were the grouping of the trees and their content on them as each watercolour leaf was separate from the tree base.

















