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i usually tend to draw sketches like lines and not like volumes, but on this site i see usually most people skeching values and volumes first and lines eventually after.
i am personally feeling much more comfortable draving raw lines first and then passing them into photoshop doing the values stuff.
i mean, is there a reason why is everyone here skeching in the traditional way or they (you?) simply like it more?
i'm not really in the position to hand out legitimate advice as I am a novice artist. But I assume it's more of a preference. Though I have heard that painting in volumes/blocking first rather than sketching lines makes it easier to see value.