First drawing and tryout underpainting

So I am there: started to draw and immediate a beginning with the underpainting. This more or less to see if the color concept I have in my head will work. You have to think in values first......

After drawing and looking at the painting I think I might have a problem with my old friend The Perspectieve. IT AIN'T RIGHT!!! I must have been focussing to much on my raster guidelines..... 

Okay, that's why they have invented gums. After a few minutes gumming the whole painting went a dark kind kind of smokey gray. Sometimes I have all the luck of the world; used a synthetic gum in state of mother nature's own rubber.....

I will first do some more painting to see if the smoke will come through...