HELMUT: It definitely looks odd, vs. Vanilla ships. None of them are lit that strongly on the left; in fact,
none of them are lit primarily from the left.
If we compare these, we can see subtle differences:
1. Eagle's lighting pretty much matches the Blade's; both are largely lit from the top and front. I've put the Blade next to it and you can see that both are lit very similarly; although there are some minor inconsistencies, given the styles, and the greebling is certainly different, the overall lighting is very similar.
2. Dominator has confused lighting sources, which make it feel a bit flat in places- the engine highlights indicate lighting from both sides and largely the design looks like it was simply mirrored, but the turret positions indicate that the light comes from the top and front.
The other greebles on the Dominator also indicate both top and front lighting, but some details can be considered as lit from the side.
3. The medium tanker has lighting from the left and top (that's a greeble he re-used in several ships), but the body is mirrored and has side lighting, except for the gun locations and portions of the front... where they aren't mirrored.
So the lighting there is quite confused; if it was consistent with the point sources, we'd see shadows from the tanks on the body, which we don't.
I think a lot of your confusion about Vanilla lighting stems from he fact that David's lighting hasn't always been consistent, by design, which he said earlier.
That's an interesting artistic choice- sometimes it works, by bringing out details, but sometimes it makes designs look flat because the lighting is unclear. I don't think it works on the Dominator, personally, but it's subtle enough that the forms are still clear.
That isn't saying that it's definitely consistent as a strong directional light by any means, though, more that he's
intentionally left it inconsistent.
You're kitbashing, so you're stumbling into all sorts of parts that have strong side-lighting, but that's not like looking at the wholes. I can understand why that might be confusing; you need to look at whole ships and go through the details to see that it's not consistent and is very often mirrored wherever it saved time, which increased the inconsistencies in places.
What you're doing there is inconsistent with
any of the Vanilla artwork, though- for your lights to cast those shadows, they'd have to be quite low and to the left. Instead, presume three light sources to the right, left and front- so you'll see soft shadows on either side of tall things and deeper shadows on the rear of them. All of the lights are quite high up, so the shadows will be relatively small.
I really think you should go through that tutorial I wrote and attempt to light that ship in a way you feel is Vanilla; you're trying to arrive at definite conclusions from art that is pretty deliberately not going to give you any