Material preiew is dead slow

Tried Corona 15, its material preview is dead slow, need around half min to show preview.

Tried in 2026.2.

Thanks.

Iac, is this issue in C4D ?

yes, its Cinema 4D screen.

Has this been resolved? Lately my materials also take a long time to generate, not as bad as this video…but it is new and distracting. Can the nvidia driver have an influence on this?

Hello, to anyone getting this problem:

Since we are unable to reproduce this on our machines, please submit a support ticket here and attach a minidump file captured during the material preview reloading: https://support.chaos.com/hc/en-us/requests/new

Here is how to capture a minidump file (see point 2): https://support.chaos.com/hc/en-us/articles/4648898278545-How-to-report-issues-C4D

We need your minidumps in order to fix this.

Thank you in advance!