Chaos Corona 13 for 3ds Max - Daily Builds Discussion

[danio1011]

Any ideas when Porting Material and Render Dialog UIs to Qt could be implemented?
It's the most popular request in Corona Ideas Portal with almost twice as much votes comparing to Toon shading.

Recently, I worked on a project in V-Ray after many years of working with Corona.
The difference in the material editor response is significant, and consequently, the workflow and productivity is improved.
I don't want to diminish the value of toon shading, I know that some users have been wanting this feature for years
but improving material editor response could be great improvment in everyday work for all users.

Was it VRay GPU or CPU you were using?  I'm just curious why with VRay slate would be snappier (I don't doubt it, I seem to vaguely remember experiencing it back in the day.)  Are aspects of slate\VRaymtl ported to QT already or something?

I'm happy for those users getting their toon shader but, man, for me the sluggishness with SME is such a buzz kill.  Will be great to see that getting improved one day!

[maru]

Are aspects of slate\VRaymtl ported to QT already or something?

Yes: https://www.chaos.com/blog/the-qt-fication-of-v-ray
This article also explains how much work it is to convert from win32 to Qt.

[danio1011]

Are aspects of slate\VRaymtl ported to QT already or something?

Yes: https://www.chaos.com/blog/the-qt-fication-of-v-ray
This article also explains how much work it is to convert from win32 to Qt.

Thanks Maru!  Interesting read.  Definitely would be amazing if\when it happens.

[CharlyRT]

Hi
Im testing the newest Daily Build (chaos-corona-13-3dsmax-daily-2025-02-28.exe)
CoronaMix map has changed its behaivior, heres an example of the same material, in Corona 12 update 1 hotfix 1 and with the new one.
This is messing with all the materials that are using CoronaMix, could it be related to "Added mix alpha option to CoronaMix map"
I have tried recreating the material and its giving me the same new ressults, could we have a "legacy behavior" option like other maps or what can I do to restore the old behaivior?
The only "solution" is to turn off "perform mixing in sRGB space" but it seems thatt the color is not the same

[maru]

Thanks, this is now confirmed and logged for the devs.
(Report ID=CMAX-1509)

[LorenzoS]

Hi,
on Interactive Lightmix is no more possible to select the lights in the scene by pressing the right  mouse botton.

[Aram Avetisyan]

Hi,
on Interactive Lightmix is no more possible to select the lights in the scene by pressing the right  mouse botton.

Hi,

It is possible, you just have to click on the free space after the layer name.
Nevertheless, this is reported now and will be improved - right click on any part of the row should open the context menu.

(Report ID=CMAX-1514)

[Mattschia]

Hello, I'm having issues with the Vantage export: all the materials that have a Color Correction texture (max native one, not the plugin) don't get translated properly and have missing textures in Vantage, is this a known issue?

I've tried for testing to remove the color correction but my maxscript is not great and i can't get the original texture to be translated:

for m in (getClassinstances color_correction) do replaceInstances m (BitmapTexture texmap:(getSubTexmap m 1))

Can anyone help?

[maru]

I tried with the 3ds Max Color Correction and Corona Color Correct and the results seem pretty close. Could you please specify what exactly you mean by "don't get translated properly and have missing textures"? Could you share a sample scene, or at least screenshots showing what you are getting?

Update: I am pasting a maxscript I wroteChatGPT wrote. It removes the Corona Color Correct and Max Color nodes from material diffuse slots and instead plugs the bitmaps directly. It works for any material which is assigned to any scene object. I couldn't force it to affect all material editor materials, even unassigned.

Code: [Select]

-- Global recursive function to process materials
fn processMaterial mat =
(
    if mat == undefined then return ()  -- Skip if undefined

    if classof mat == CoronaPhysicalMtl then
    (
        if mat.baseTexmap != undefined do
        (
            -- If the diffuse map is a Color Correction or Corona Color Correct node, strip it
            while (classof mat.baseTexmap == Color_Correction or classof mat.baseTexmap == CoronaColorCorrect) do
            (
                local ccMap = mat.baseTexmap         -- current color correction node
                local originalMap = getSubTexmap ccMap 1  -- get its input (the bitmap)
                if originalMap == undefined then exit  -- if there is no submap, exit the loop
                mat.baseTexmap = originalMap          -- assign the bitmap directly to the diffuse slot
            )
        )
    )
    else if classof mat == MultiMaterial then
    (
        -- Process each sub-material recursively
        for s = 1 to mat.numsubs do
        (
            processMaterial mat[s]
        )
    )
    -- (Optional: handle other container material types as needed)
)

-- Main function to gather and process all materials
fn RemoveColorCorrectionsFromCoronaMaterials =
(
    local allMaterials = #()  -- array to store unique materials

    -- Add all materials assigned in the scene
    for m in scenematerials do
    (
        if m != undefined do append allMaterials m
    )

    -- Add materials from the Material Editor if not already included
    for i = 1 to meditMaterials.count do
    (
        local m = meditMaterials[i]
        if m != undefined and (findItem allMaterials m) == 0 do append allMaterials m
    )

    -- Process each material
    for mat in allMaterials do
    (
        processMaterial mat
    )
)

-- Execute the script
RemoveColorCorrectionsFromCoronaMaterials()


[Ledahublanc]

Hi,

I have this error when launching 3dsmax 2026 on clean install :
Impossible d'initialiser DLL <c:\programdata\autodesk\applicationplugins\chaosscatter3dsmax2026\ChaosScatterMax2026.dlt> correctement - échec de chargement.

everything is ok on 2025 !

[maru]

We do not support 3ds Max 2026 yet. Check out this post by Tom G: https://forum.corona-renderer.com/index.php?topic=44692.msg232315#msg232315

[v.p.vlasenko]

Hi,

hiding/unhiding layer with corona light (and, probably, lights itself) cause max crash with latest daily. Previous doesn't have such problem.

[maru]

Thank you for reporting this, I was able to reproduce it and logged it as (Report ID=CMAX-1575).

[3dcorner]

Hi

I have a crash when exiting Isolation Selection with the latest build from 28 March. Going back to the previous build of the Corona fixed the issue.
I also tried resetting 3ds Max to the default and reinstalling Corona, but that didn't help.

Tom

[maru]

Could you send us a scene where this can be reproduced at https://support.chaos.com/hc/en-us/requests/new ?