Tweaking ambient / diffuse lighting to achieve great contrast

Hello everyone,I just *love* seeing the self shadowing of terrain at dawn, despite its somewhat pixelated appearance. However I find the contrast between shadowed and lit areas to be too small.Are there any tweakable lighting parameters in FSX in which I could tone down the ambient lighting? So an area that is not in direct sunlight will appear much darker.Additionally, I would like to increase the effect that direct sun exposure has on terrain. I hope to get some stunning contrasts in particular on desert terrain at sunset (e.g. Arizona, Monument Valley and the likes). Right now the effect is simply not pronounced enough to take my breath away.Would anyone know how to achieve this goal? I run DX9, so don't suggest I turn on bloom ;)Christian