@procyonlotor Lovely day and night scene. There’s not much I can critique there.
The bumping on the truck chasis (light grey) looks wrong. Something about that doesn’t really sit right with me. Maybe it’s too extreme of a bump? I like it on the cab and the bucket(?) Maybe the treads could use some wear and tear, too. I see it’s between the treads, but maybe it could creep up into the treads a bit.
Sorry to hear about the crashing issues. Hopefully you can pin that down and fix it.