I tried for a more dramatic atmosphere here by adding a low lying cloud to simulate fog; but, at this point, I experienced problems related to memory. Also, two populations of vegetation should have covered portions of the lower foreground but didn't show up in the final render. Hopefully, after updating to 64 bit with 8GB of RAM, many of these issues will be resolved.
The Cubic B spline filter with anti aliasing bloom was used in the final render to soften the image.
Models are:
• The Noble One tree by Walli – free at Planetside
• Dry Shrub by Walli – purchase at NWDA
• Stone bed by FrankB – purchase at NWDA
• Grass by 'klas' – free at Planetside
• Pine tree by Walli – free at Planetside
• 'One Cloud Atmosphere' clip file by littlecannon– free at Planetside
• Fill Lights clip file by Oshyan – free at Planetside
Enjoy.