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Blender light weirdness . . .

backsteptbackstept1666 Posts: 864Member
edited December 2022 in Technical Questions and Answers #1
I recently rendered some orthos and I switched my scene world from my nebula hdr to just a grey background to get even lighting all around. Now when I switch back my sun lamp is acting strange and I have no idea what's causing it. It's like I accidentally messed with an exposure setting that only affects lights, emissive materials don't seem to be affected.a6g5ox3jvx5g.png
The next thing I'm going to try is just to append everything in a fresh file. I have no idea what to do.
This seems to only be happening in cycles, eevee seems fine, but I don't use eevee.
Post edited by backstept on
scifieric
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  • backsteptbackstept1666 Posts: 864Member
    #2
    Appending everything in a new file worked, but . . . . WHAT DID I DOOOOO!?
    scifieric
  • scifiericscifieric1114 Posts: 1,487Member
    #3
    backstept wrote: »
    Appending everything in a new file worked, but . . . . WHAT DID I DOOOOO!?

    Wow! You're living in an alternate reality! I hope this doesn't happen to you again.
  • backsteptbackstept1666 Posts: 864Member
    #4
    Yeah I literally checked every setting I could think of. I appended my whole collection to a new file and it's fine now so that leads me to think that it's not anything to do with my lights or materials. Gotta be a world or render setting. But I checked all those! Anyway....
    scifiericTallguyevil_genius_180
  • TallguyTallguy350 Posts: 467Member
    #5
    One of the things I'm very wobbly on since 2.9x is how world settings and render settings hit up against each other. I had a similar issue with a new scene a couple weeks ago.

    It's funny, when I was more active and 2.9 came out and changed everything it was easier for me to adapt because I could tell when something was different. Then I had to take care of other priorities for a while. Now I'm trying to get back into things and all of my muscle memory is still mostly with pre-2.9. (Or was it 2.8? See? I don't even remember that!) Now if something doesn't work I can't tell if it's because of a change or because of faulty memory.
    scifieric
    Bill "Tallguy" Thomas All I ask is a tall ship...
    Various Work: U.S.S. Constellation - Matt Jefferies Concept Shuttle
  • evil_genius_180evil_genius_1803841 Posts: 10,785Member
    #6
    Tallguy wrote: »
    One of the things I'm very wobbly on since 2.9x is how world settings and render settings hit up against each other. I had a similar issue with a new scene a couple weeks ago.

    It's funny, when I was more active and 2.9 came out and changed everything it was easier for me to adapt because I could tell when something was different. Then I had to take care of other priorities for a while. Now I'm trying to get back into things and all of my muscle memory is still mostly with pre-2.9. (Or was it 2.8? See? I don't even remember that!) Now if something doesn't work I can't tell if it's because of a change or because of faulty memory.

    I have nowhere near as much experience with Blender as you do, but the last time I did anything serious with it was 2.8, and I can tell you that a lot has changed. So much that I thought I was going bat**** crazy trying to remember basic stuff, only to realize that I was remembering it correctly, but they changed things. I was messing around with it again the other day and it took me a long time to get a basic ST saucer shape. :lol:
    scifieric
  • CowardCoward520 Posts: 34Member
    #7
    Not sure what could be causing this and short of looking at the blend file itself, I'm not sure how much help I can be, but here's a few suggestions:
    • Try turning the strength to 0 and the colour to black in the world settings. This should stop the world properties from influencing your lighting, which may help isolate if it's another setting causing the issue.
    • You can also check out the world shader nodes by going to the shader editor and changing it from object to world. The default settings for it look like this
      tvrrrskwmc24.png
    • Check that the colour management settings aren't causing the issue.
    • if you're using it, check that nothing weird is going on in the compositor.
    • Try adding a new sun light, to confirm whether the current lights are an issue.
    Also instead of using the world properties to get even lighting, you can try Fast GI Approximation, which can be found under Light Paths in the Render Properties tab. Just set the Method to Add, and adjust the AO Factor until you get the desired results.
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