This is one photo-grain-tracing example.
I take photo of wave. Then i grain-trace it's form and then colored it natureland colors to looks like mountain.
First transform photo size of your new painting size by using example artrage tracing process. ( Import image, rescale it that your painting size, export image.)
1. Open new painting.
2. Edit paper settings, grain,,,, that trace-image.
3. Paint using chalk(about 10-15%) those wave-forms on layer.