I made a cube in Blender. The cube has BSDF Glass shader. When I render it there is a lot of noise and fireflies.
I tried everything: Change clamp, change light bounce, denoising, glossy filter, more samples... just everything. I don't know what to do now. When I removed the cube there wasn't noise. The light is point light and in the center of the cube. Blender 2.81 Beta, Cycles.