Craig's palaeontologic reconstructions are created digitally using the 3D software Carrara. In some pieces the creatures are composited into the artist's own photographs, and in others whole environments were created within the computer. Craig can be commissioned to do reconstructions.
Contact him at email@example.com. As Craig is passionate about science eduaction and outreach, he is willing to do volunteer artistic work for non-profit scientific or educational purposes such as scientific papers. Send him your project's proposal if you are interested in gratis artwork.
Craig has a dedicated porfoilo here, and maintains a blog that includes work in progress reports here.