It's not too hard, it's just a much darker color than the main sand, and just make it curvy where the two meet. The watercolor brush tool is the best thing ever in SAI for backgrounds, it makes it so easy. ;;
I WILL buy one from you lol I only have 200 points right now though O_O but I'd like to buy one with 2 characters in it Would you have an estimate cost for that? Just so I know how much I'd have to save up?
For headshots, it's 400 ($5) for the first character (includes shading and background) + 300 for the second character. For full body, it's 800 ($10) for the first character (includes shading and background) + 700 for the second character. You can mix and match too, and have a headshot and a full-body together. xD Kind of depends on what you want.