I'm missing something.

[somewhereinusa]

I've been working on this and it's almost finished but, it just doesn't look right. Iit just doesn't look right under the bus. I tried adding the tailpipe and license plate, it looks like something needs to be under there.  On the right is the picture as I took it, you cant see anything under there. Probably not the final background, I just needed to put something there because you can see through the windows. Any suggestions?

[M1000]

Maybe add a drop shadow and make shure the horizon is where the vanishing lines meet.

[firstdefence]

A shadow can help ground the bus

Darken the interior.

Where are the seats?

Add a few highlights to the edges of the bus.

[carl123]

I would add some wheels, even though the original pic does not show any

 

[Alfred]

1 hour ago, firstdefence said:

Where are the seats?

Good question! There should be a whole row of seats at the back.

22 minutes ago, carl123 said:

I would add some wheels, even though the original pic does not show any

That helps quite a lot. Perhaps they could be placed a little higher up, so as not to look as though they’re at the very back of the vehicle body.

[firstdefence]

When drawing something it also helps to have other shots/angles of the object, just to get a sense of it really.

[somewhereinusa]

Thanks everyone, all good points, I'll work with them and see what turns out.

 

[Andy05]

8 hours ago, carl123 said:

I would add some wheels, even though the original pic does not show any

That's exactly what I'd have done in order to make this illustration "work".

[user_0815]

I'm not an illustrator but form a photography perspective I would see these points:

Most important is a shadow underneath. Large and soft like in the original image. If it's too hard, it takes too much attention.

The contrast of the individual elements is very different. The white roof is too bright and takes the most attention. I'd darken it and keep the line beteween the roof and the blue body brighter. Lighten the ladder as in the original.

Those three elements on the Bumper need more highlight accents to make them less flat. Same for the blue vertical bars in the windows and the lights top left and right (they look flat but they have a gradient in the original image).

Also the housing of the three-dot-light in the middle needs a shadow.

The text and the dog on the panels are too bright and stand out a lot.

The entire subject is lit from the left side, so it is slightly brighter left than right. You already added a highlight to the top left. It would be better visible if the roof was darker. (But the red rear-lights seem to have the highlight on the top-right instead of top-left.)

You could also add the reflection on the blue hood above the window.

Whether I'd add wheels or not would depend on the height of the horizon. A lower horizon indicates looking rather down. In this case I wouldn't see the wheels. A higher horizon indicates a lower perspective looking straight or rather up – making the wheels visible. 

[Old Bruce]

7 hours ago, user_0815 said:

Whether I'd add wheels or not would depend on the height of the horizon. A lower horizon indicates looking rather down. In this case I wouldn't see the wheels. A higher horizon indicates a lower perspective looking straight or rather up – making the wheels visible. 

You also have to take into account the angle of view and viewer's distance from the bus. If you have an extreme wide view and are very close to the bus you can look up or down and not see the wheels. If you are very far away from the bus but have a narrow field of view the wheels may be visible a lot more easily.

[somewhereinusa]

Made some changes, learned a lot about adding highlights and shadows.

[Alfred]

7 hours ago, somewhereinusa said:

Made some changes, learned a lot about adding highlights and shadows.

The shadow looks good but it doesn’t extend down far enough, so it looks as though the exhaust pipe and the license plate are touching the ground. As mentioned earlier, adding wheels would help.

Put in some seats and you should be good to go!

[R C-R]

11 hours ago, Alfred said:

Put in some seats and you should be good to go!

Or ride standing up? 😄

[somewhereinusa]

They're in there.

[Alfred]

6 minutes ago, somewhereinusa said:

They're in there.

Too subtle for me!