It’s hard to tell looking at the screenshot: is it becoming transparent or black?
Sorry for the delay!
Which version of Corona and 3ds Max are you using?
I tried reproducing this by applying a Corona Physical Mtl with the “Chrom rough” preset, but my object does not become transparent. Same with the Corona Material Library materials.
Just to make sure: if you right-click on your object and go to its properties, you are not using the “see-through” option, right? (the default shortcut is Alt+X)
If the above does not help, could you attach any sample scene where you are getting this? (it can be even a single teapot with a problematic material applied to it)
Try to turn off transparency in viewport preferences - 3ds Max 2023 has this bug where it sometimes shows some objects as transparent for no apparent reason. Turning transparency off solves this issue, but you’ll loose any transparency in that viewport - still much better than a viewport full of ghost objects.
In your original post you mentioned materials from the Corona Material Library and even a Physical Mtl - is this true, or was it a mistake?
If it only happens with Chaos Scans in Corona, please try our latest daily build: https://forum.corona-renderer.com/ Chaos Corona 10 for 3ds Max - Daily Builds Changelog
There were some fixes to Scanned Mtl appearing transparent in the viewport.
I also have the same issue in some scenes, and as an alternative to Romullus’s solution, you can leave the transparency as it is (object sorting), but change the material rendering level from advanced material to basic material.
Please look at my attachment.
Could you please share this scene with us? (or a similar one where the issue occurs) - https://support.chaos.com/hc/en-us/requests/new
Hello Maru,
I have submitted the scenes with ID #116656.
Best regards
This issue is related only to “Advanced Material” option in Viewport preferences > Settings (first tab) > Material Rendering Level.
There is non-transparent material applied to the blue object and the expected result is to not see anything through it. Changing this option to default “Material Editor Setting” or “Basic Material” fixes everything.
And this is a 3ds Max glitch rather than anything related to Corona.
The original issue:
is related to CoronaScannedMtl, and has been resolved already in the daily builds (01-24 DB).
You can test the scene with the latest daily build and see if the issue is still there:
https://forum.corona-renderer.com/ Chaos Corona 10 for 3ds Max - Daily Builds Changelog #msg212584
Remember to back up the scene(s) when opening them with Daily builds.
Hello Aram,
Thank you and the support team for promptly investigating my two scenes.
Indeed, this is different issue.
To be honest, changing the material rendering level in the viewport settings is just one of three possible ways to restore normal viewport behavior.
It is not yet clear whether changing the Material Rendering Level from “advanced” to “basic” permanently helps, as an second option we can also simply switch the Viewport Display Mode to “performance” and then back to “standard” and achieve the same result.
And the third way is to disable transparency in the viewport settings.
Have you noticed all three of these methods?
It’s interesting that this bug persists even in newer versions of 3ds Max, such as 2023 and 2024. I will report it to Autodesk.
Best regards
Hey there!
Any known solution?
Ive been working on a scene for a couple months and lately, a floor with terrazzo material just suddenly becomes transparent. Only be able to see the boundaries when it is selected.
If I restart max, it appears again.
Its a big pain in the ass becaus I seeing all the 1st floor ceiling models and cant even guess if I working properly.
Hi,
Have you tried the possible solutions above?
Yes, I tried all of them, and they are not working. Actually, some other models also dissapeared.
They are fine when rendering, but they dont show up in any viewport mode. Not even in clay.
Can you please attach the scene or send it with a ticket here:
https://support.chaos.com/hc/en-us/requests/new
I will try to have a look at it as soon as possible.