---
title: "VRayPtex"
canonical: "https://documentation.chaos.com/space/VMAYA/111740718/VRayPtex"
format: markdown
---
This page provides information on the V-Ray PTex Map.


## **Overview**

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## **Parameters**

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##   
**Notes**

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More information about PTex is available [here](http://ptex.us/overview.html).

- PTex files are strongly connected to the topology of an objects's mesh. Therefore any modification which change the topology will break the rendering of the PTex texture. If you want to smooth the object, you can use V-Ray's own subdivision/displacement.
- When using PTex textures for displacement, small cracks might appear along polygon edges because of slightly different filtering applied to the PTex texture on adjacent polygons. Setting the filter width to 0.0 will improve the situation, but will cause the most detailed mip-map level of the PTex file to be loaded thus increasing the required memory.
- When using PTex textures for displacement, it might be necessary to adjust the Min/Max parameters of the [Displacement Control](https://docs-chaos.atlassian.net/wiki/spaces/VMAYA/pages/111740369), especially if the texture has negative colors. Otherwise the texture values might be clipped away.