Summary: This paper discusses three distinct techniques for animation of procedural textures and describes the assisting software tool. Animation is attained by moving the rendered point before texture evaluation, changing the definition of texture space or changing the texture colour mappin. Examples are given for textures that base on noise and turbulence functions in order to simulate natural phenomena. Some phases of texture animation process can be automated by using the code generator supportod by a library of animation effects. Aspects of practical implementation are discussed and Renderman compliant code is presented.