I'm rendering a transparent cup with water + transparent plate. However, the right bottom part of the shadow seem quite off. It has artifacts in the shadow.
Before using the
Denoising Data option in
View Layer Properties, however it looks kinda ok. It looks like this.
So maybe it's a problem of denoising? However, this is part of the tutorial of Blender Guru's Donut Tutorial and he's using the denoising option and it looks just fine.
Here is the blender file just to be sure.
My sampling rate in the renderer is 128 and I'm using Blender 2.8. All the transparent materials are made by Principled BSDF, Transmission 1.0, and Roughness 0.0.