哇，这画棒极了！(in Simplified Chinese)
wā, zhè huà bàng jí le!
棒 excellent / very good (implying the person doing it is really with high skill or strong ability)
极 at here means "very"
棒极了would mean extremely good
or
哇，这画好极了！(in Simplified Chinese)
wā, zhè huà hǎo jí le!
好 good
好极了 very good
You can replace the word 画 in the above sentence with option words in (2), (3) or (4) to suit the meaning you want.
1) 画 would be a general word for all kind pictures / artistic drawings / paintings
2) 图画 can be "drawing" (artistic) / "painting"
3) 画像 is "drawing / painting of person", sort of a portrait
4) 相片 or 像片 or 照片 means "photograph"
