# Inspect Textures

Textures often have a pseudo-random character. They can be partially described by some basic characteristics (like the direction or width of the brush strokes). However, they also have a random character which changes from one sample to the next. The challenge is to accept these "normal" variations while still detecting small, yet visually disturbing, defects.

While the Red Analyze Tool – Unsupervised Mode is able to find anomalies in complex surfaces and textures, it requires that the anomalies are visually sufficiently salient to be separable from the background texture. If this is not the case, or essentially, if an unsupervised red is not responding to certain anomalies or defects as required or expected, you need to switch to Red Analyze Tool – Supervised Mode.

###### Learning Objectives

- Understand the difference between the Supervised and Unsupervised mode of the Red Analyze tool.