Basic rules:

1. natural photography means photo with natural view as possible.. digital manipulation is allowed with some conditions (see below).
2. no modelling please..

Digital manipulation of image is limited to the following:

1. Tonal and colour corrections
2. Moderate sharpening and saturation
3. Removal of dust specks and digital noise
4. Image cropping
5. Panoramic image stitching from more than one original image
6. HDR