Buddha images are actually crafted by humans out of clay, metal, wood, or what have you. Being creative people, we create Buddha images so that we can pay reverence or respect to our great Teacher. As Buddhists, we never pray to Buddha images, for they are nothing but artful representation of the Teacher. It is his teachings that bring benefit to us when we follow and practise them.
As Buddha images embody the purity and omniscience of the Buddha, they carry with them the aura of the Dhamma (the teachings of the Buddha). We feel a sense of confidence and protection in the presence of Buddha images. Evil and negative spirits will stay clear from these Buddha images.
You will not be creating any bad or negative kamma, please be assured.