Breaking Changes

This section of the manual will document changes in the plugin that may require user attention to resolve.

Beta 3.00

Roughness

Prior to version Beta 3.00, the roughness value of all materials (excluding the Principled BSDF and Autodesk Physical Material) was interpreted differently than it is now. In the old system, the roughness value of a shader was used directly for roughness computations, but in new versions this value is squared first to be more consistent with other 3d software.

This means that if you had a material set up to work correctly with older versions of this plugin, you will need to increase the roughness value so it looks the same in newer versions. To find the new roughness value that should be used, you can simply take the square root of the old value.

As an example, a roughness of 0.25 in versions prior to Beta 3.00 is equivalent to a roughness of 0.5 in Beta 3.00 and later and a roughness of 0.01 in the old versions is equivalent to a roughness of 0.1 now.