Irradiance map slow down when using matte object

[Guest]

After making a plane a matte object and setting alpha contribution to -1, affect shadow and alpha on. The irradiance map slows right down when calculating where the object meets the matte floor. Using V-Ray 3.0. I currently have the matte object set tyo not affect reflection or refraction but even turning this back on slows it down even more.

[vlado]

Which particular V-Ray build do you have?

Other than that, there is an issue in our bug tracker related to this and we need to look into it.

Best regards,
Vlado

[Guest]

Using the latest 3.00.03, that's good that it is already a known issue.