Here are the steps I used to create the white rose.
Step One
Get basic rose shape established.
Step Two (Three Photos)
Create warm and cool areas, enlarging the blossom as you go.
Step Three (Two Photos)
Add warm darks in crevices.
Then, "pull" each dark area, on only one side,
to create form shadows.
Step Four
Adjust cools and warms to create subtle form changes.
Step Five
"Clean" edges and sharpen subtle light areas.
Step Six
Add strong highlights to rose (center of interest)
and add cobalt blue and clear crystal areas of vase.
Note: The vase still needs some work, so I will post the final painting a bit later, once it is completed.