Nothing to explain - seems like caustics don’t see the pattern.

It’s working here in a very simple test scene. This means best thing to do is share an image showing your result, that way we can see how complex the scene is, what kind of set up you have, and so on. [caustics on pattern.jpg]

(also, which version of Corona? I am using the 10 daily build from Jan 31st)

Hi, here are fast interactive renders First two - without corona pattern Two next - copy of the same object with corona pattern mod. The scene is quite big and complex but for previews I isolated just 4 objects. The reflective surface, sun + 2 objects to receive caustics (one with pattern) Lates…

Interesting! The second image in each pair is the Caustics render element? If so then the one with Pattern does show something on there so it isn’t that nothing is happening on the Pattern just that it is different. That makes me wonder about the surface normals etc. of the object being Patterned. C…

[image] TomG: You never know :smiley: Yeah))) Seems like the problem is solved by replacing the material of the patterned object. The weird thing is in the attachments. Material marked red - producing the wrong result. Marked green seems to be correct. While those materials look the same.…

Still very interesting - was the scene created in an earlier version of Corona maybe, even an earlier daily build? And the non-working material (marked in red) is one that was imported from that? Just trying to figure why two identical-seeming materials might be different.

The scene itself is quite old, probably half a year (long playing project), but the material, as well as the pattern, was created after 3rd February, so it was created with the latest daily. Just a couple of days ago and I already don’t remember where it came from))) Not sure if I created it from s…

You could send us the scene with just a cube and the problem material in it, for us to have a look at. Meantime, am I right in thinking that you can fix the actual production scene by replacing that material, and then attaching all the maps to the new Physical Material?

[image] TomG: Meantime, am I right in thinking that you can fix the actual production scene by replacing that material, and then attaching all the maps to the new Physical Material? yep, correct. Material without maps attached. caustics non friendly material.zip (119 KB)

Merging that into my simple test scene, it worked fine, so it didn’t offer any clues for me as to why it was broken in your original scene. TY for sharing that problem material though!

CoronaPattern not receiving caustics

Corona Corona for 3ds Max Issues

rowan_manns February 27, 2023, 7:40pm 13

Hi,

This is fixed in the latest v10 daily build. You can grab it from here: https://forum.corona-renderer.com/ Chaos Corona 10 for 3ds Max - Daily Builds Changelog #msg210105

Cheers,

Rowan

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CoronaPattern not receiving caustics

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