# Overview In this section, we'll cover various light manipulation techniques. In my definition, techniques are a slightly different area than a specific "technology", but it is ultimately a semantic difference. There are some projects mentioned in the previous section that could be considered a technique as well. Typically in the techniques I mention below, you are using something like a standard display but in a non-standard way. You may be using a display and augmenting it with a plastic or cloth material, you may be using a fog machine to create a projection surface instead of a flat wall. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://blair-neal.gitbook.io/survey-of-alternative-displays/techniques/overview.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.