I made another post for this earlier but I didn't exactly explain it well enough. On the render, you can see the stars and such behind the planet, as if it's transparent. I tried using the Alpha Over node in Composition like I was told but it didn't work. I was re-directed to another post but it wasn't really the same thing. My background is another layer and such, as shown in the bottom left. I can't get it to appear in the above so I can connect it to Alpha Over and it won't let me add one to its node editor.

The bottom right is the planets texture and the top is just more detail onto it


The Nodes

Here's the link to the file https://www.dropbox.com/s/m032wc3pg66a7wv/Game.blend?dl=0

  • $\begingroup$ If your didn't get satisfactory answers, please edit the original question to clarify your intentions instead of duplicating your post. Also, the images posted on this question are very low res. It's hard to read the nodes. Making your file available with some explanation of the elements you are using would be the fastest way to get your issue resolved. $\endgroup$ – cegaton May 10 '16 at 16:54
  • $\begingroup$ @cegaton Sorry, I'm new to this forum. It said on the other post how I have to continue through chat as comments were getting too long and for some reason it it said I wasn't high enough? Also it said that the question was already answered so I was confused on whether I could still add to that post or not. Sorry about the screenshot, when I get ahold of a computer I'll post the file. Also, I'm using cycles render with "noise" as stars. The tutorial I was following did it $\endgroup$ – TitanJedi May 10 '16 at 17:18
  • $\begingroup$ Let's continue this in chat $\endgroup$ – cegaton May 10 '16 at 17:25
  • $\begingroup$ It says that it's read only and I need 20 reputation. In about 30 min, I'll be able to fix the screen shots. Since I can only post 2 on here, I can instead post a link to an Imgur album of multiple images with better resolution $\endgroup$ – TitanJedi May 10 '16 at 17:43

You just missed to check "transparent" in the render panel, under the film section. Once you do that, your two renderlayers will have their own alpha channels and you will be able to composite them.

However, you'll notice that you no longer have the sky background. To bring it back you just need to turn the environment pass on in the planet render layer, and use it as background for your two plates.


I think I know what's going on, so I'm just gonna go ahead and take a stab at it... we'll see whether my risk pays off or not ;-)

I'm not convinced that you're seeing what you think you're seeing. I'll bet that you're using the Cycles renderer. Furthermore, I'll bet that the "stars" you're seeing "through" the moon is actually noise that is the result of too few samples.

To test this, replace your stars background with a checkerboard or some other non-spots background. I'll bet the checkerboard (or whatever) does not show through, and the "stars" are still there. This would indicate that it's not transparent, and the noise just happen to look like the stars you're using.

If this is true, the solution is to render more samples, or be more selective about which samples you're rendering (with branched path tracing). There are also other more specialized and more sophisticated noise reduction techniques that may be worth looking into.

I hope that helps!

  • 1
    $\begingroup$ The stars are noise I added using nodes. I've increased the samples, to the point of tripling it, yet it doesn't fix it. $\endgroup$ – TitanJedi May 13 '16 at 17:46
  • $\begingroup$ well darn, I guess I'll have to guess again ;-) $\endgroup$ – Matt May 13 '16 at 17:58
  • $\begingroup$ If it helps, I used this tutorial for it youtu.be/9vbq6HOgA2w Sorry that I'm not much of a help, pretty much everything I've done so far is through a tutorial as I have no idea what I'm doing $\endgroup$ – TitanJedi May 13 '16 at 18:00

Guess #2!!

Try reversing the inputs of your Alpha Over. It's possible that your stars are going on top of your moon, and the "black" is alpha.

If that's the case, it'd certainly look the way it does, but without being able to see your nodes (images are small), it's hard to tell for sure.

  • $\begingroup$ Sorry, I split it up into 3 albums, the first being of the nodes within Composition imgur.com/a/bHSkH This is the nodes for the planets texture imgur.com/5wo5xd8 and here's the background aka stars imgur.com/a/h4RAg It only let me put 2 images on here so I was pretty limited. But I'll try reversing the Alpha Overs and see what happens $\endgroup$ – TitanJedi May 13 '16 at 18:05
  • $\begingroup$ Oh my... that's a really complex setup. For starters, only swap the slots on the VERY FIRST Alpha Over, the one that combines the two render layers. If that doesn't fix it, then it'll take some more intense digging. $\endgroup$ – Matt May 13 '16 at 18:07
  • $\begingroup$ It didn't change anything imgur.com/a/uIpyZ I got the file link here, that might be easier though I don't know if the planet texture will be missing in that or not. dropbox.com/s/m032wc3pg66a7wv/Game.blend?dl=0 Here's the texture I used just in case 1.bp.blogspot.com/_9DvzmslTIME/TQrT5bEDbII/AAAAAAAAAi4/… $\endgroup$ – TitanJedi May 13 '16 at 18:21
  • $\begingroup$ Fascinating.... $\endgroup$ – Matt May 13 '16 at 18:34
  • $\begingroup$ What do you mean? $\endgroup$ – TitanJedi May 13 '16 at 18:50

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