Image 1
Piece by : Chris J. Anderson Link: http://www.leewiart.com/excellentres/239.html
As you can see by my arrows there is quite a lot going on in this image, its probably about mid day in the image, the sun is high in the sky which means A LOT of objects are covered only allowing the taller more prominent objects are creating shadows.
(top right) As pointed out the sun is hitting the rock, lighting up that area and slightly dragging your eyes towards it, i say its a sun but it could be anything as you can see at the bottom the characters are paused motionless, maybe watching/looking at something?
(top left) The reaction of the light hitting the rock in turn means there is a large shadow cascaded onto the track, pulling and darkening all the colors in that area, giving it a frosted looking meaning you have to look closer to observe what is there.
(bottom left and right) To the left there is another light source entering from off the image, lighting up the backs of each character, To the right there is another shadow, maybe another rock being hit by the first light source, which means the two shadows in this image are joining up to create one long and consistent shadow all the way up the image.
Image 2
Tera Online Concept (artist and location unknown, this is not my work!)
(top right) its clear this structure is below ground, as you can see trees over growing the roof faintly among the bright light, the light has a blueish tinge to it maybe suggesting it is night time and the moon is creating the light, but as you can see due to the light being above it lights up everything, there are minimal shadows being made, only on things under neither or with a slight over hang.
(middle left middle right) these two are pointing out the fluid falling from the vase high above the statues head, the vase being so high in relation to the fluid glowing could suggest the light source from above is adding some sort of magical light/making the fluid glow, this specific glow draws your eyes to this focal point, making it the (along with the statue) the primary subject in this image, this also means the light sources as a whole are the subject matter for this concept adding some mystique and wonder to this concept.
all in all both images create alot of mysterious aspects and lingering questions, purely from the light sources alone, i hope you enjoyed this analysis, more Project work to come this week!
-AC