"画师约稿" 用英语可以表述为 "commission an artist" 或者 "hire an artist for a commission."

"Commission" 在这里的意思是指 "to officially ask someone to create a work of art or to do a specific job." 来源于拉丁文 "commissio"，意思是"委托，授权"。

例句：

I'm looking to commission an artist to paint a portrait of my family.
The gallery is commissioning artists to create new works for an upcoming exhibition.
I'm considering commissioning an artist to design a logo for my business.

中文翻译：

我想约画师为我的家庭画一幅肖像画。
这家画廊正在约画师为即将举办的展览创作新作品。
我正在考虑约画师为我的公司设计一个标志。