Attempted this particular painting six times today. Three times on a half sheet paper and 3 times in my study book and once in a pencil sketch. The pencil sketch is by far the best but the color versions remain a challenge. The values and temperature of the walls throws me off.

st_2014_07_12, 6th attempt today. Retiring hurt.

 

The 5th attempt I chose to crop to salvage the composition.
wp_2014_07_12, rescuing 5th attempt by the final weapon - cropping.