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I followed along with a tutorial to texture the earth in cycles. Everything worked well and looked nice until I changed the sample rate. The planes I used for lighting turned black and my renders are without lights.

I tried to add a normal light, no better results. Is there a setting that I could have enabled that could be the cause of this?

Here you can see a screenshot of the rendered view with the light emitting plane.

enter image description here

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  • $\begingroup$ did you change any of the values for clamp direct or indirect? $\endgroup$
    – user1853
    Commented Oct 23, 2014 at 22:07
  • $\begingroup$ Not that I know, clamp direct is set to 0.03 I assume that it should be 0? $\endgroup$ Commented Oct 23, 2014 at 22:10
  • $\begingroup$ It works again! Thank you so much :) Could you explain what clamp does? And eventually set your comment as an answer so that I can accept it? $\endgroup$ Commented Oct 23, 2014 at 22:11

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