Slicer material error

Hi everyone,

I’m having occasional issues with Corona Slicer materials in Cinema 4D R25/2026 + Corona 15/14/13.

The strange thing is that the result seems inconsistent between frames/cameras. For example, an instance with a Slicer material in the reference element does not cut correctly on camera 1 / frame 1, but the exact same element works fine on frame 2.

The setup is simple: a symbol has a cylinder with a slicer material on it (including ceiling 1 + 2 + 3) and some geometry for the spot + light source. Then instances are placed throughout the scene

When rendering around 30 cameras/frames, about 5 to 10 frames have incorrect slicing results. Nothing changes in the setup, so it feels random or evaluation/cache-related.

Has anyone experienced this with Slicer materials, especially on instances or in batch rendering?

Thanks!