# Equirectangular smooth filter¶

## Description¶

Spherical render without (above) and with (below) the filter

This filter fixes the high noise level caused by the equirectangular projection at the upper and lower parts of spherical renders. The image is filtered anisotropically following the pixel/solid angle projection differential. This ensure uniform resolution and noise levels when projected back on a sphere.

Note

Before Ocean 2016, this filter was named sphere resolution fix

## Input and output¶

• Accepts any channel list as input

• Output channels are the same as input.

• Does not alter the buffer dimensions

• Removes denoising meta-data

none

## Ocean XML 4.0 example¶

<filter type="sphereresolutionfix" name="#"/>