It's haram to make idols of images. Because of the emphasis on this in Islam it's generally been taken that to involve oneself in the making of images itself is haram. This is not the case. The intention to make an idol of an image is what is important here and not merely the image itself. If this is missing, then there is, generally speaking, no objection to pursuing a career or a talent for image making or otherwise being involved in such.
The Dar al-Iftya Al-Missriyya, the main religious institution of Egypt has issued fatwas specifically on this. They say:
Drawing humans is permissible according to some scholars. Maliki scholars ... and the Hanbali scholar, Ibn Hamdan have maintained this position ... In his Mussanaf [Hadith collection ordered by topic], Ibn Abu Shaybah reported this opinion from the venerated tabi'i [a person born after the Prophets death (pbuh) and who accompanied some of his Companions] Al-Qasim Ibn Mohammed, and who was known as one of the best scholars of his time. The Hadith reads:
Ibn 'Awn said: I entered upon al-Qasim in his house which was located in the upper part of Mecca and saw a hajla [a net placed above the bed to serve as protection against flying insects] with the images of a beaver and a phoenix.
They then conclude:
Therefore, there is no objection to drawing animates such as humans, animals and the like; whether from imagination, nature or photographs. There is no objection in Islamic law in pursuing this talent provided that the drawings are void of anything prohibited and do no incite sexual desire.