I meant that even if perspective crashes a bit on the sand crawler, it's almost imperceptible

The speeder and that metal dish seen in the very foreground are clearly out of scale according to threepio's scale and I think that was what called my atention. You could remove them and yet be getting a great image of the lars residence. There's also something with the colour saturation between the sandcrawler and the dome, far more saturated than the vehicle, but of this things, Angel our professional illustrator could tell you better, I just don't have the means for telling what feels a little out of place with colours, I just perceive it.

Of course, don't take this as bumming, I'm just trying to help you get an unnoticiable way for introducing your changes, which are very promising.