From my experience...

Tripping is like being plunged into another dimension, where your thoughts surround you visually. So what i mean is, images you've seen before,images your mind makes up, you see vividly in front of your own eyes. Foreign colors, shapes, and 3 dimensional patterns appear, and unfold odd changes. Melting of objects, morphing of objects, shrinking, and expanding of objects simulteniously. Wood grains forming different shapes, and detailed pictures, sometime wood grains move like water across wood. You can see precise detail of all objects, and appear to look perfect.

This is my analogy of what a shroom trip is like to me... but we all know its very hard to explain such a fantastic experience.