Debug shading isolate select, how it works under the hood

[Muhammed_Hamed]

Hi,

Dragging a texture into an object or using the material override option under settings, how it works under the hood is that it connects the texture into the diffuse slot of a vray material and applying that material to an object
This way the textures appear brighter than expected, This is not how debug shading(isolate select) works in Vray Max/Maya/Modo
For the correct behavior, create a Vray light material, connect the texture to the color slot and apply that material to an object, this is how I expect my textures to be like
Am I missing something?
This is a very big deal, currently I create a light material to be able to drag into my objects and see the effect of my textures.

Best,
Muhammed

[bdancer]

> This is not how debug shading(isolate select) works in Vray Max/Maya/Modo

Exactly, because this is not debug shading. "Dragging a texture into an object" in the IPR is the Houdini feature we just wanted to support and it does what it does.
Currently, I plan to implement this workflow https://forums.chaosgroup.com/forum/...986-debug-node rather then this "drop" thing.

[Muhammed_Hamed]

Awesome!
Thanks for the input Andrei!
This would be handy for look dev, instead of the current workflow of making a light material and dropping that into objects.

Best,
Muhammed

[bdancer]

Muhammed_Hamed, VOP debug flag support is implemented in the nightlies. Please, check if it works as you expect.

[Muhammed_Hamed]

Thanks so much Andrei, that was quite fast!
3 things to note in my testing today,
-debug flag works in a way where it applies the texture to diffuse slot of a Vray material(like what I explained in my original post above)
This is not good for many reasons, in normal lighting,textures would appear brighter.. and in dim lighting it would be very hard to see how textures looks like(and i will need to go back to the old workflow of creating a light material manually)
I prefer how isolate select works in Maya/Max/Modo .. which works as if I connect my texture to a light material, so regardless of the lighting in my scene I can see exactly how my textures looks like

-color correction node appears black when using the debug flag, only node I came across so far that has this behavior.

-after stopping the IPR and starting it again, there is an issue if the material is applied to multiple objects. Debug shading flag would only work with one object, it won't update on all other objects(on the first IPR run, everything worked without issues)
I show all 3 problems in my video here
https://www.youtube.com/watch?v=BQsK...ature=youtu.be

Link to scene,
https://drive.google.com/open?id=16O...XsyQpdHy_2PLcj

Thanks so much for all your help!

Best,
Muhammed

[bdancer]

1. Light material is the exactly one used internally. The only thing I could think of is: are u using physical camera?
2. Which one of the color correction nodes?
3. I'll check.

[Muhammed_Hamed]

1. Light material is the exactly one used internally. The only thing I could think of is: are u using physical camera?

Hi Andrei,
Yes, I'm using physical camera with these settings?
Should I disable that?



I'm not getting the effect of a light material in my testing. textures still rely on scene lighting, as if they are connected to diffuse of a typical Vray material"

Which one of the color correction nodes?

Vray color correction, this one



Thanks!

[chakarov]

Hello Muhammed_Hamed ,I've added your request for using "Light Material" when a texture is "debugged". I also reproduce and report the "colorCorrection" node behavior in debug mode. But I can't reproduce your third reported issue, even with your scene.

[Muhammed_Hamed]

Thanks Georgy!
will have time tonight to try and test more for the third issue
The behavior is not consistent, sometimes it happens and sometimes it doesn't

Best,
Muhammed

[Muhammed_Hamed]

chakarov Hi Georgy!
Here is a new scene for the 3rd issue
I have attached a new video of how I reproduce the issue.

https://drive.google.com/file/d/1scW...ew?usp=sharing

Best,
Muhammed

[chakarov]

Hi, debug mode works only if the builder network is applied to the geometry. In this case when you restart the IPR some of the apples has material that points to output node not the builder network. This is already logged but still not fixed.

[Muhammed_Hamed]

Thanks Georgy!
In my video I applied the output node to only 2 apples, then you can see that this behavior affected 4 Apples.. 2 of which I didn't touch at all
Using the output node affects other geometry in the scene randomly(not just the ones I applied to), had this in other scenes as well