Is the command line region render flag broken?

[giandosopaolo]

I am trying to render only the bottom region of my maya animated sequence by using the command line render.

In the command editor I wrote:

>render -r arnold -s 126 -e 242 -reg 0 1919 900 1079 -im MyScene_01 E:\_Projects\MyScene\MyScene.mb

The render starts as usual, but I noticed that Arnold is rendering the full 1920x1080 image, not just the region I selected and the render time is not diminishing.

Am I doing something wrong?

Should it be -reg 0 1919 900 1079 or -reg 0 1920 900 1080 ?

Is anything broken?

@thiago.ize 

[LFGFX3D]

Yes, it seems the -reg flag has been broken for a while now. There is a workaround though - use the following command in the Ai User Option of the defaultArnoldRenderOptions:

region_min_x # region_max_x # region_min_y # region_max_y #

where #s are your pixel coordinates

[Stephen.Blair]

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@LFGFX3D wrote:

Yes, it seems the -reg flag has been broken for a while now. There is a workaround though - use the following command in the Ai User Option of the defaultArnoldRenderOptions:

region_min_x # region_max_x # region_min_y # region_max_y #

where #s are your pixel coordinates

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That was supposed to be fixed in MtoA 5.1.1.1

• MTOA-999 - Region Min and Region Max values are not exported

[Stephen.Blair · Accepted solution]

Looks like that fix never made it in, or we broke it again. I've reopened the ticket.

Here's how to set the user options on the render command line:

render -r arnold -s 1 -e 1 -ai:lve 3 -preRender "setAttr -type \"string\" defaultArnoldRenderOptions.aiUserOptions \"region_min_x 0 region_max_x 1919 region_min_y 900 region_max_y 1070\";" example.ma

[giandosopaolo]

Thanks! 😊

[giandosopaolo]

I tried using the line of text you suggested in the command line @Stephen.Blair 

It seems like Arnold gets stuck when I use it. Meaning it keeps precalculating the shot but never really starts rendering it. 😕

[giandosopaolo]

Ok, it seems that it works, but only if I add xres 1920 yres 1080 before region_min_x

[Stephen.Blair]

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@giandosopaolo wrote:

I tried using the line of text you suggested in the command line @Stephen.Blair 

It seems like Arnold gets stuck when I use it. Meaning it keeps precalculating the shot but never really starts rendering it. 😕

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Works fine for me when I try it.

xres and yres should always be exported. I don't know how to make them not be exported...maybe it's something in the scene setup?