Well... I don't mean to be rude or mean or insulting.

I find it better to understand what you are drawing regardless of medium.
That is what makes it real/nice.
Even you want to achieve unreal/fantasy/abstract, you need to know the real thing to break them.

I apologized if I sound very stern up there. It is just that people come from different medium should be utilizing the experience skills theory they learnt to apply to other mediums. Some could work, some might not. When it works, great, but when it doesn't, it just means that you have more new things to learn!
Coming from different medium should be something to be proud of, not to be blame.

Now I sound like a lousy motivationer... DX