I'm quite new to Blender and Cycles render engine, so I need some help to understand how I've got these rendering artifacts and how to fix them.
The overall picture is very noisy and there are a lot of anomalous white pixels.
The whole scene looks like this.
The sphere is used as the source of light and has the emission shader.
Each test tube is imported from another file and has Glass BSDF shader.
I've bumped up a little numbers of light paths transparency and bumps (don't know what does that mean, actually), but I think it does not help much.
I don't know what else to add, so here it is. What should I do?
