The speed paint landscape was the first I tried with a reference picture that went fairly well.
Next was the forest landscape, another speed paint that took me a little longer to replicate.
This was an imaginary landscape made in Illustrator using preset effects.
My favourite was the pixel landscape, which took me about 18 hours to complete.
Last, but not least, I experimented in photoshop with Matte painting before my final composition.
The composition above is the last I made, using all of the above experimentation to create an artwork I call "Deadline TIme Break". This composition was my own experience of design and the strains of meeting a dealine.