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I wonder what is causing this; I render animation and see, that sometimes random frames are overexposed. On earlier versions they were fixed when I rerendered the overexposed frames in Max UI. This has been the case forever with V-Ray. However now the overexposed frames cannot be fixed with rerendering. Any workaround for this phenomena?
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So, here's a comparison between two frames. At frame 165, the roll is much brighter and emits light to surrounding geometry. It looks like flash light every ten or so frames. I wonder what's behind the phenom.
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This is not getting any attention, so I created a support request.Comment
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Support has not yet reacted to my request. I wish I could find a solution soon.Comment
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It seems, this issue has zero interest from Chaos side. Neither support has reacted my request. Is there anything I can try here to get some advance in this project.
As a reminder, the problem is that on object is repeatedly "flashing" brightly, which illuminates the surrounding object. This doesn't look nice at all; rather it ruins the scene.Comment
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I don't do animations so I'm not sure what could be in your case.
Some general thoughts...
- have you auto exposure on? I don't know if that feature works both on animation...but, if yes, it could sample some differences from frames to each others and tweak the camera accordingly.
- just a stupid question: have you tried to render the animation cancelling the object animation...just trying to debug the scene
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Thanks,
I'm not using autoexposure - I never use it. I iterate EV-values, to get the color pigment right. If I have many cameras, I calibrate them all one by one.
At the moment, I'm reimporting the geometry in question.Comment
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Check if geometry has double faces. This could lead to issue.
If it's something like this and clean the geometry it's too long and difficult, you could raise a little bit the secondary rays bias in the global switches.Comment
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I increased the secondary ray bias. It seems to be helping. However I have not found any double faces.Comment
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Did you check the normals of the object? Also posting here will not get enough attention better to post in the respective subforum for 3dsMax, most people or even Chaos employees don't check this Common section.Comment
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I didn't find any double faces nor normal issues.
I have noticed, collapsing or attaching many objects make some funny things to object topology, but I can't point out what exactly happens there. Anyway renderings look awful when that happens.Comment
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It's quite difficult to debug this without further images or Max file to download and check.
What about smoothing groups? Did you model them?Comment
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This sounds like you're using imported geometry from another CAD application. This shouldn't happen with regular Max geometry. If you're using imported geometry it's best to check the normals with an editnormal modifier. If they are green, that means they are explicit and most cases they should not be as far as I understood from most geometry imported. You can reset them so they are blue (unspecified).Originally posted by JuhaHo View Post
IF you really want to be helped just attach part of the geometry here on the forum so people can take a look. Otherwise it's useless posting here.
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As I just noted in another post, one odd and unfixable thing is that when a mesh that has a turbosmooth applied, set to isoline display, is converted to editable poly then it destroys the mesh, leading to render errors.
This can't be fixed. Maybe you have some items that are like this.
Otherwise as suggested, the only real way you'll get a quick solution is to post a mesh part
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