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Messages - maru

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[Max] I need help! / Re: [Solved] light include only decals
« on: Yesterday at 18:15:17 »
Another option I can think of would be using an environment reflection override in the material which is assigned to the decal object.

[Max] Resolved Bugs / Re: Corona Decal not visible in masks
« on: Yesterday at 14:31:48 »
I am moving this thread to resolved. The issue is logged here and it is logged in our system.

(Internal ID=1109050825)

[Max] Bug Reporting / Re: The Cosmos Browser wont open
« on: Yesterday at 14:27:46 »
Hello, did you have any success with starting Cosmos?

Hi, according to your support ticket #115878 it seems that you got Scatter for 3ds Max running. Can you please explain if:
- you are able to render Scatter at all
- you are able to control the materials of your Scatters by applying a material to the original instance (not to the Scatter object itself)
- you are a 3ds Max user


[Max] General Discussion / Re: Intel Denoiser prefiltering
« on: 2023-05-30, 17:51:33 »
It's 1.4.1, and yes, we are aware of the new version so it may be available soon.

Here is a random example of the current 1.4.1 version with prefiltering. Sorry, I do not have the information how many passes it was, but you can see how it compares with the NVIDIA one:

No problem! I understand it can be confusing.
On the other hand, it seems that there is no way to specify which exact decal should be using which exact material.

Sorry for the delay. Perhaps I don't understand your setup, but it seems to be working fine here.
I am using a similar setup to yours. Multiple decals projected onto multiple boxes. Multimap in "Object GBuffer ID" mode. Each Box object (not Decal object!) has a different ID assigned using right click > object properties > object gbuffer id.

As you can see, different opacity masks are used on different boxes, depending on their ID.

Also, if you project a single decal onto multiple boxes with different IDs, that single decal will use multiple opacity masks (as expected).

I am using Corona 10 RC1 but will check if the same thing happens in V9.
Update: it is working in V9 as well. I will need to know more about your setup to understand what seems to be the issue.

@Mirco - We are still interested in looking into this. Have you shared your scenes with us somewhere? If not, could you please submit a new support ticket here and attach your scenes? (or some other ones where the issue is reproducible)

Thanks in advance!

I don't really make custom scripts that might suffer from this change

As explained, this will NOT affect any scripts. :)

Hi all, in the newest daily builds we renamed "Corona Maps" to "CMaps" in the material editor:
- Old: CoronaAO, CoronaBitmap, CoronaSelect
- New: CAO, CBitmap, CSelect

The main reason for this was that in some cases, different nodes could appear with the same name in the material editor. For example: "CoronaM..." could be a Corona Multimap or a Corona Mapping Randomizer, which can be confusing:

Please let us know if you like this change and whether it affects your workflow in some way or not. If we decide to use this naming, then we should stay consistent and also rename materials:
- From: CoronaPhysicalMtl, CoronaLayeredMtl, CoronaSlicerMtl
- To: CPhysicalMtl, CLayeredMtl, CSlicerMtl

Note: this change is purely cosmetic - it does not affect things like maxscript!

[Max] I need help! / Re: Material inconsistency
« on: 2023-05-26, 10:11:45 »
Hi, do you need some further help here or can you confirm that the issue is resolved now?

[Max] I need help! / Re: Lighting Issue - Please Help
« on: 2023-05-26, 10:07:46 »
Hi, I can see you have also reported this through a support ticket #120698.
We will assist you over there and share the final notes here.

[Max] Bug Reporting / Re: The Cosmos Browser wont open
« on: 2023-05-25, 16:59:56 »
Please try this:

1. Close 3ds Max
2. Run the Corona installer again and reinstall Corona
3. Open the Start menu, type "Stop Chaos Cosmos" and run the "Stop Chaos Cosmos Browser" item
4. Open the Start menu, type "Start Chaos Cosmos" and run the "Start Chaos Cosmos Browser" item
5. Check if it works correctly now

If it doesn't seem to work, please contact us at and a dedicated team will help you.

[Max] Feature Requests / Re: Rounded Camera Clipping
« on: 2023-05-25, 16:53:14 »
I think there was a discussion at some point about different shapes for the "camera physical size" feature and camera clipping, but there were some technical reasons why it was left as cube/plane.

In our guides we explain how to use the Slicer Mtl in combination with the Rayswitch Mtl to slice through walls without affecting scene lighting at all.
See "7. Corona Slicer Material with "Cap sliced geometry" option enabled, "Override cap material" option disabled, and used with Corona Ray Switcher Material" here:

I hope this helps!

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