@ Pixelpusher
Thank you, very kind!
And congratulations, I have the same problem, so I totally understand your situation.
When I start up my machine... it says... ASUS Motherboard 2009 (LOL!).
I would like to do more Renderings like my "Lake Tahoe" series, but I haven't enough RAM (Only 6GB available).
This Lake Tahoe series constist mainly of layers, which has been rendered seperately and combined later in Photoshop due to my restricted memory.
(I know that I could do it again, but it's so much effort to create such a scenery with my outdated machine.)
But back again to your mountains. Just some ideas...
First, try to estimate the average size of all your objects in your senery. At a glance your big boulders stick out totally because they are pretty big!
I mean, well it could be that way in nature, but it does not look natural in your image. It's just about the proportions. Boulders in proportion to the mountains.
Same for water.... I sometimes place a light source in a way that I have reflections on the water. Just to see how the size of the waves match to the rest (in proportions).
Sometimes an artist creates a good scene, but the porportion don't look natural and so his artwork ends up somehow below the capabillities of an otherwise cool work.
Same for textures of the plants. A good texture with a good lightning to it, makes the difference!
Often plants or trees are dull, booring and don't look lively. Like leafs with some dust on it or lustreless barks. How can you expect to get an atractive result with textures like this?
Also water... especially water...
If you look at your lake, it looks totally mossy. Would you like to jump in it?
Well... if not... try something else. Maybe a bright turquise or a more bluish look would make a real difference here.
Same for reflections in the water. If you have a real good sky, increase your reflections to bring in a nice sky in a harmonic way.
Maybe a little bit this way
See the reference and especially pay attention to the reflection of the sky in the water (mixing the water colors with the sky colors) towards the horizon to make it all clear.
Just try combinations and look what's kicking...
But all these suggestions are only my 2 cents here.... Basically your scenery is a good point to start.
STORMLORD