Hi Katana,
We are entering an area that can get very technical in a hurry…
You are getting into areas that are appearance related… the appearance of an object consist of the following factors (I will list the most important ones):
1. Gloss
2. Texture
3. Color
4. Opacity
5. Shape
6. If it is metallic or not
7. The angle of illumination
If you change any one of these factors or attributes, you change the appearance. Please note that color is an attribute of appearance (most people tend to intuitively think that appearance is an attribute of color). A lot of issues that are interpreted by untrained observers are thought to be due to difference in color… when actually, the color is the same.
So, to answer your question… yes, texture will influence the appearance of an object… to a human observer or a camera. The gray examples shown above are of differences in color, gloss and texture.
[A little secret... the chip with the textured blob of paint on it, they are the same color]
You may want to refer to this thread - this was plastic and had a few forumites confused...
http://www.vikingsword.com/vb/showthread.php?t=582