# MPSImageTent A filter that convolves an image with a tent filter. ``` class MPSImageTent ``` ## Overview The kernel elements of the filter form a tent shape with increasing sides, for example:  Like a box filter, this arrangement allows for much faster algorithms, especially for larger blur radii but with a more pleasing appearance. The tent blur is a separable filter and the Metal Performance Shaders framework will act accordingly to give the best performance for multi-dimensional blurs. > Note: > The box filter, while fast, may yield square-ish looking blur effects. However, multiple passes of the box filter tend to smooth out with each additional pass. For example, two 3-wide box blurs produces the same effective convolution as a 5-wide tent blur. > > In effect, addition passes tend to approximate a Gaussian line shape. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)