You can't, unless the painting will be seen an even warmer light. When you paint in a warm light, the tendency is to keep compensating for the warm temperatures, and the painting will be way too cool under natural light. If you paint under an incandescent light, you'll overcompensate for the cools, and the painting will be too hot under natural light.

Painting slowly has ironically cut the overall time it now takes me to complete a painting.

Yeah, the problem I have is that the times I get to paint are usually late at night. I'm forced to use artificial light. I use blue-filter bulbs to help reduce the warmth but it's still not the same as natural light. Any recommendations on how to produce a more natural lighting environment without spending a lot?

I'm a bit confused by what you're saying here. Do you mean if I paint under cool lighting conditions?

Edit note: Yes so sorry, that's what I meant:)

This makes complete sense to me. I find most of my time is spent trying to correct things - if I did it right the first time, I wouldn't have that problem. Mind you, from life, I want to try to make it easy for my model in a given sitting...of course the consequence of that is more sittings.

Dave,

I love the color and intensity.

Nothing done from a photograph could touch this. Great job!

This is an outstanding painting imo. As a viewer I dont keep hanging on the technique but to that 'something' that emerges behind this portrait. :thumbside (Wish my English was better :) )