Why does the larger the Caustic Subdivs in GPU mode, the darker the caustics

[123456_]

The picture compares the values of Caustic Subdivs 40000 and Caustic Subdivs 80000, and it can be observed that 80000 is much darker，I have uploaded the engineering files

[boyan]

Nihao,

Thank you for the reports. It seems that you hit the limit of the rays, and above that, rays are terminated.

I will investigate that and keep you posted about that.

[123456_]

Nihao,

Thank you for the reports. It seems that you hit the limit of the rays, and above that, rays are terminated.

I will investigate that and keep you posted about that.

Looking forward to your investigation