Why am I getting these blotches?

[pentool]

Hello,

I've been working on this image (hate to admit, but...) for about a week now. Ok, I only have time about 3-4 hours a day, but still. (...and by the way, looking at the images in this forum really doesn't help my self-esteem... but...)

I'm having a hard time adjusting my plastic material for this USB flash cap. I keep getting these light kinda blotches, reflection, thingies. I've tried to adjust various parameters, but not having much luck. Does anyone might have a tip what parameter should I adjust?

Here's the render I did about a week ago (amongst the first renders). It almost looks OK, but not quite.



For whatever reason I didn't like it (cuz I'M AN IDIOT) and messed it up. Now all I get is this. You see those light patch thingies on/around the plastic cap and its shadow:



These are my current material (for the plastic cap) and render settings. The rest of the settings are default. Caustics is off.





Any tips/ideas? Thank you!

[vlado]

Do you have caustics enabled by any chance (in the Causitcs rollout)? If yes, disable them. If not, disable the Refractive GI caustics (in the Global Illumination rollout).

Best regards,
Vlado

[pentool]

Thanks so much! Yes, it was the Refractive GI Caustics in the GI rollout was causing it, which was turned on.

(...I never gonna learn all this.....

[dynaman]

you are picky cause that first image looks just about damn perfect to me! nice work.