Is you monitor calibrated?.... good proceed

just playing around with a piece of white paper and a packet of mentos for that high key look
Outside the circle
natural light from window to the left (diffused by a sheer curtain) and a little bounced back from another piece of paper to the right to soften the shadows
Outside the circle

natural light from window to the left (diffused by a sheer curtain) and a little bounced back from another piece of paper to the right to soften the shadows