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I'm guessing this has been asked thousands of times but I haven't been able to find a helpful answer yet:

I'm getting strange light striping & shadows that show up at specific angles on this object. The object seems to be ok Any ideas what is causing it?

Render preview

wireframe

light at different position

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    $\begingroup$ From your image it looks like bad topology and a lot of Ngons. It could also be faces overlapping. If you are using EEVEE, try to increase your shadows resolution too $\endgroup$
    – Emir
    Commented Apr 26 at 18:05
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    $\begingroup$ it looks like an artefact created by the low-angled light? $\endgroup$
    – moonboots
    Commented Apr 26 at 18:11
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    $\begingroup$ It's a problem with the soft shadows in EEVEE (they are simply not as good as "real" shadows in Cycles). What you can do is disable Soft Shadows completely in the Render Properties (but then the lighting will of course look different), or in the Shadows options set Cube Size to 4096 px to make the streaks finer (but still ugly) or in the settings of your light set Soft Falloff > Radius to a higher value, at least 0.25 or more (then the lighting looks of course different as well). Or just set the light higher above the object so that the angle is not so low. $\endgroup$ Commented Apr 26 at 19:34
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    $\begingroup$ That all worked great, thank you @GordonBrinkmann ! $\endgroup$ Commented Apr 26 at 19:53
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    $\begingroup$ @Gordon or Matthew .. I don't think this one has come up before like this, so an answer or self-answer would be better than closing out as not needing one? If one of you has a moment? $\endgroup$
    – Robin Betts
    Commented Apr 27 at 7:28

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