vrscene export from Max to Maya

[thescopeteam]

Hello, we have scene in 3ds Max, some materials have a dirt node with values for the Z axis. When exporting the scene as a vrscene the axis do not get flipped in Maya, so the bias of the dirt material is still in z-axis and not y-axis in Maya :/ is this not working in general?

[hermit.crab]

To view the dirt bias correctly, you would have to change the Up axis within Maya to Z (Windows>Settings/Preferences>Preferences>Settings>World Coordinate System).

[thescopeteam]

really? isn't it possible to program it so that vray changes the axis automatically, depending from where the vrscene comes? In a vrscene there is a comment:

/////////////////////////////////////////
// Exported by V-Ray ADV Plugins Exporter
// V-Ray core version is 4.30.02 built at Apr 8 23:17:58 2020 b4e50a4
// Exported at Thu Jul 16 11:32:38 2020
// V-Ray GPU Next for 3ds Max 22.3.0.3165, update 3.2
/////////////////////////////////////////
// Frame at time 0

so vray should know to auto flip the axis when rendering with Maya for example no need to change the axis in Maya, that would be a smart solution

cheers

Florian

[hermit.crab]

Thanks for the feedback. Indeed, it should. I've written an improvement request about the matter (internal bug-tracker id: VMAYA-9766) for our developers to investigate. Another workaround may be to use the VRayScene's scene overrides to switch the bias to the correct axis. In the following example, I've overridden the Z-bias to 0 and the Y-bias to 50 (original Z=50, Y=0):

TexDirt Map__1@tex_0 {
bias_x=0;
bias_y=50;
bias_z=0;
}

You should open the .vrscene in Notepad to lookup your scene's dirt texture naming.

[thescopeteam]

thanks, indeed, this is what I did so far, I changed it in the vrscene. Our vrscenes are quit big (2GB) so I had to used UltraEdit for the editing but it works