Topics

1

[Max] I need help! / UVW Randomizer Issue

« on: 2022-09-25, 14:11:35 »

See screenshot.  These 3 objects (close up of banquet seating) have the exact same material on them, except the furthermost left one.  The only difference with that one, is the jpeg used for maps are also plugged into UVW Randomizers.

It looks to me as if the normal map is being inverted when plugged through the UVW Randomizer.  Which in turn is making it "shinier".  I've no idea if thats because of the inverted normal map or if it's also inverting any of the other maps i.e. bump, gloss etc.

Max 2021 Corona 8 HF1

2

[Max] I need help! / Understanding Disney Specular

« on: 2022-09-20, 22:26:49 »

Bear with me.

Various vendors (old and new) supply texture sets with 'Reflection' maps.  When using these with the Legacy Material, it was relatively logical.  The values in the reflection maps ranged from 0-1, which directly correlated with the reflection level spinner.

To use those same textures in the physical material, my understanding is that we need to specify Disney specular, then under the hood Corona is converting the values in the texture to IOR values?  Is that right?

If so, then is it also correct that any 0 values in the texture are being 'remapped' to IOR 1, and any 1 values are being remapped to IOR 1.8, and all the other grey values somewhere inbetween?

If I'm still on track, that makes our old reflection maps pretty useless for the physical material without reworking the maps in PS or something first so they fall within a range of 0 and 0.5 and thus behave in the same/similar way as they would with the legacy material??

3

[Max] Feature Requests / CoronaCam 'Flip' View

« on: 2022-07-07, 20:35:38 »

It would be nice if the CoronaCam had the ability to 'flip' horizontally what it displays.  Much the same as photoshops flip horizontal does.

4

[Max] I need help! / Anodized Aluminium

« on: 2022-05-31, 11:30:57 »

Something that's always confused me in terms of material creation is Anodised Aluminium.

In terms of the physical material - is it a metal or not?

I appreciate it's not raw metal in it's original form but as it's not a separate coating such as powder coat, or applied such as paint, does that mean it's still a metal?  Is it simply enough to create an aluminium material using metalness workflow and increase the roughness to give the appearance of the anodised finish?

5

[Max] Bug Reporting / Multimap and Randomzer Bugs

« on: 2022-05-30, 23:41:48 »

If I open an old scene created in C7, C8 doesn't seem to respect the older UVW Randomizer or Multimap Settings.

For example in C7 I had everything set to 'Mesh Element', I've just opened the scene in C8 and the Multimap is set to 'Face Material ID' and the UVW Randomizer is set to 'Instance'?

6

[Max] I need help! / Boulder Retaining Wall

« on: 2022-05-12, 13:15:42 »

While not strictly Corona, i'm looking for some ideas as to how best to achieve a boulder based retaining wall like this?

Boulders from Megascans and Tyflow?

The walls follow a specific path/volume

7

[Max] I need help! / Tone Mapping Reset

« on: 2022-05-04, 03:18:14 »

Hi

I've had to do a full reinstall of Windows tonight, after getting back up and running, I've just opened a scene that was saved before in Corona 8 before the full reinstall and all of the tone mapping settings have reverted back to how I had it setup in Corona 7 before ever installing Corona 8?.

Where are the tonemapping settings saved for the scene files?  Did I delete them when reinstalling windows?

8

[Max] Bug Reporting / LightMix Issue

« on: 2022-05-03, 17:01:34 »

Having an issue with LightMix where I often have to turn one of checkboxes off and on for the frame buffer to recognise that I'm on the LightMix element.

This happens when rendering a region, or sometimes just restarting IR.

Hard to explain, but I've got the lightmix element selected in the frame buffer but it doesn't show the results of lightmix until I tinker with something.  As if it defaults back to Beauty if the render is restarted or a region is rendered.

Official Corona 8 release (Max 2021)

9

[Max] Bug Reporting / Sheen Bug

« on: 2022-05-03, 15:27:55 »

Found an issue with sheen.

Let's say I have a 3D Person sat on a sofa, i just want them to cast shadows ready to comp in a 2D Person.

If the sofa fabric has sheen turned on, then the 3D person has to be visible to reflection/refraction otherwise you don't get any shadow from them.

10

[Max] I need help! / Displacement Issues

« on: 2022-04-28, 09:14:36 »

Hi

Still getting displacement issues, same old problem it looks like.  I'd pay a premium to have the old dispalcement back.

Render on the left with displacement, middle shows the mesh, right with no displacement.

Corona 8 Official Release

11

[Max] I need help! / Awful performance with Forest Pack - who's at fault?

« on: 2022-04-26, 21:07:10 »

Posting this here and on Itoosoft forums - but the rendering difference without and without Forest Pack is night and day.

I'm trying to render a lawn, with the lawn turned off no problems at all.  Turn the lawn on and it takes an age to kick into action, then goes into parsing for ages, then I can't cancel out of it until parsing has finished about 15 minutes later.  Corona 8 (latest official release, no dailies) and latest Forest Pack.

12

[Max] General Discussion / Windows 11 Upgrade

« on: 2022-04-14, 13:54:40 »

Just wondering if anyone upgraded to Windows 11 yet and whether there's any bugs/issues to be aware of when using Max/Corona?

13

[Max] I need help! / Overrides Completely Unaffected

« on: 2022-04-12, 14:13:13 »

Is there anyway to have the environment overrides completely unaffected by anything in the frame buffer?  The Tonemap Control just doesn't seem to cut it at all.  And yes I've tried restarting the renders etc etc.

I need to render with the backplate visible (full 360 pano) and I'm also using it for reflections.

The issue is regardless of the tonemap control settings, something on the backplate is affected, even after a restart.

The only way I can get full 1:1 representation of the backplate I see in Photoshop, inside of Corona, is by not touching anything at all in the frame buffer.

I'm aware of LUT issues regardless of tonemap control settings, soI'm avoiding those.  Filmic Highlights/Shadows affects the backplate horribly (saturated pixels everywhere - unless they're both set at 0 or both set at 1).  Adjusting curves affects the backplate, even after restarting the render etc etc.

Is it possible, or is the only solution to render twice and comp back in?  Although this isn't a solution for reflections

14

[Max] I need help! / Saturation affects Exposure????

« on: 2021-12-21, 22:39:26 »

Lowering the saturation in VFB appears to affect overall image brightness - is this normal?  You can test it just by having the curves window open while you make the change - the whole histogram shifts to the right when I lower the saturation

15

[Max] I need help! / Getting a Bitmap Error during IR

« on: 2021-12-10, 10:48:39 »

I'm getting this error

"Render had to be aborted because a bitmap on disk changed and is being reloaded. Continuing the render could cause crash or undefined behavior. Bitmap name is: XXXX"

Interestingly it's while I'm using IR - but the helpdesk article states "This message is never displayed when using interactive rendering (in such case the rendering will be automatically restarted instead)."

The render doesn't restart though.  Also the texture in question isn't being edited elsewhere, it's just sat on my hard drive