On the top, the vertical is a brush, and the right is a hand holding the brush.
The bottom are two curves drawn or painted by the brush.
Let us compare it with character Write - 書（Post 54)
The bronze script of character Painting is
The big seal script of character Painting is
The small seal script of character Painting is
The clerical script of character Painting is
Let's compare it with the clerical script of character Write
The top is same as that of the Painting, the bottom is 日, meaning the Write is to write character in a box. They are very similar, but if you understand the meanings, you can't mix up.
The traditional song typeface is
The structure is same as the clerical script.
The simplified song typeface is
画which is the bottom of the traditional character, the top brush and hand omitted. It is a painting not to paint.
Its Pinyin is Hua4.
The character also means Draw or Drawing. Chinese doesn't distinguish Painting from Drawing.