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As shown in the picture, I have this scene where I want to film this girl from her reflection in the mirror, and from the front I have lighted her face up for the shot, but when I render it with camera pointing to her mirror reflection, her face just appeared pale and unlighted. No matter how much I jack up the light strength (even to a ridiculously high value), it just stay this way.

I tried messing with light paths, limited and full global doesn't make any difference. higher or lower sample rate doesn't make difference. Tried several glossy mode, no difference either.

Anyone know why glossy behave like this? And, if I wanted this shot done properly, what can I do?

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  • $\begingroup$ Is Clamp Indirect set to something other than 0 in Render Settings > Sampling? $\endgroup$ – gandalf3 Feb 20 '16 at 21:00
  • $\begingroup$ yyyyyeeeesssss........GAWD I feel so stupid right now. Thanks for the help gandalf. Actually can I delete this question, god this is so embarrassing... $\endgroup$ – SVAFnemesis Feb 20 '16 at 21:04
  • $\begingroup$ heh, I've been bitten by this too XD You can delete if you really want to, but it'd be nice if it could stick around to potentially help others searching google with the same problem $\endgroup$ – gandalf3 Feb 20 '16 at 21:10
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Make sure Render Settings > Clamp Indirect is set to a suitably high number, or 0 to disable clamping all together.

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i had the same problem ,the problem is your glossy shader is set to a impossible number (0.000). you should try placing your glossy shader at (0.003). at 0.000 the calculations for the shader become error-ed.

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    $\begingroup$ Your answer is being flagged as low-quality. Consider elaborating on e.g. what setting on the glossy shader shouldn't be set to 0 and why, and maybe even adding some example images to back up your explanation. Thanks :) $\endgroup$ – gandalf3 Feb 22 '16 at 5:51

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