VRayVolumeGrid load preset, change chan mapping with maxscript

[Rens]

Hi,

Is it possible to load a VRayVolumeGrid render preset through maxscript? And change the 3P channel mapping? I want to create a grid from scratch and load it with a preset.

Thanks!
Rens

[kostadin.petkov]

Hello Rens,

Currently there's no way to load render presets form a file using MAXScript, we can surely add it!
I'll post here when we have it in the nightly builds.

About the mappings:
ll the mappings are specified by a single string.This string is just s sequence of <channel-number-in-phoenix>,<channel-name-form-cache-file>;
For example if you have a VDB file with "density", and "temp" channels and you want to map them to Smoke, and Temperature respectively the mapping string would be:
"1,temp;2,density;" (The order doesn't matter.)

The channel numbers are:

Temperature - 1
Smoke - 2
Velocity X - 4
Velocity Y - 5
Velocity Z - 7
Color R - 8
Color G - 9
Color B - 10
Fuel - 11

You can check how we compose them by printing the "$.usrchmap" parameter.

If you have any questions don't hesitate to ask

Cheers,
Kostadin

[Rens]

Thank you Kostadin! This helps, I'll look into it, and yes it would be great if it could be added.
Can I write to .usrchmap as well?
You earned yourself a Like! Haha

[psanitra]

HI Kostadin

Can we please implement option to load/save color/opacity gradients from file/preset in the volumetric render settings? Recenly i did a battlefield scene with 50 or so volumegrids and it`s a nightmare to manage. In current form the render presets will load gradients but they will also change the render settings(step% etc) which most of the time you don`t want to. So having option just for gradients separately will improve the situation.

Thank you

[kostadin.petkov]

"Can I write to .usrchmap as well?"
Yes, just follow the 'scheme.

"Can we please implement option to load/save color/opacity gradients from file/preset in the volumetric render settings? "
We have something on our minds about this, we probably should bump it's priority.

[kostadin.petkov]

Hello,

The MAXScript function should be in the latest nightlies

You can call it like so:

A_LoadRenderPreset (getnodebyname "PhoenixFDFire001") "D:\\myPreset.tpr"
A_LoadRenderPreset (getnodebyname "PhoenixFDFire001") "$(dir)\\myPreset.tpr" where "$(dir)" is the current scene directory.

Hope that will do the job ^_^

[Rens]

Awesome, thank you! : )