# Normals inside V-Nova PresenZ **Normals inside V-Nova PresenZ** In the 3D industry, there are many different workflows and programs, and when you compile all your geometry together, it’s possible for normals to end up reverted. While this can cause limited issues in a standard perspective render, the implications can be more severe when using V-Nova PresenZ. During the detection phase, V-Nova PresenZ uses intensively surface normals. If the normals are incorrect, it can lead to under- or over-defined surfaces, which can cause major Moiré effects. To address this issue, it’s recommended that you check your normals using a quick normal shader render if you encounter problems such as major Moire effects. This can help identify any incorrect normals that may be causing issues with your PresenZ renders. ![](/files/0LDh6Pebje7Srix28jKF) --- # 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://docs.v-nova.com/technologies/v-nova.presenz/v-nova-presenz-documentation/normals-inside-v-nova-presenz.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.