The drawings could greatly benefit from a little more care in the grille textures and other important details. They look like a grille that has been underwater for years gathering crude. This is a place to use a straightedge or curve to get really crisp lines. Perhaps shadows on the vertical blade (in black) would simplify the image. Personally I would black in the entire grille with marker and use Eagle verithin silver pencil to do the lines on the black.
Aflo, Thanks so much for your advices. From your mentioning of the important details aside grill, what other details would you call for more fine tuning? I know I was missing door and engine hood parting lines. Thanks,
Grille textures, wheels, headlamps and any detail nearest the viewer are the important details to stress. You will get the hang of this as long as you continue drawing a lot.
your rendering is very photogenic, this shows that you have percise drawing skills, i would recommand you add some artistic style to it, which would be more exciting.
Your renderings are a single color. To make a more exciting render work with warm and cool colors. Usually warm colors reflect from the ground tones. Cool colors reflect from the sky. So your red car should have oranges and warm red colors in the ground reflections and the top surfaces should have blues, purples and cool reds.
