We were in a cave of sorts with indirect sunlight shining on the model. Thre was also light coming down a shaft containing the stairs. The 'warmth' on the model is mostly just her own skin tone. Regardless, it was all natural light, in an outdoors setting.
Can you describe the lighting? I'm a bit bothered by the fact that the woman seems lit by warm light whereas the steps seem to be lit by cool light. -- Victor