VRayUVWRandomizer - Changing some maps locations after modeling updates

[jbrasmartins]

Hello,

I've recently got hold of an issue regarding the VrayUVWrandomizer.

If I have an object such as a window, with different frames modeled in the same general object, but as different selectable elements, and apply this modifier to a map of the material, (with the option to randomize by element) after I've changed some modeling elements of the original object, the maps moves from the initial render to the modified object's render.
My question is: is this a bug or a feature? Shouldn'tthe maps retain the original position of the origal render?

Because in case of archviz, If a client sees/approves a wood grain on a certain spot, even if I change the individual components of the general object, it would be important to retain the original maps location.

Is there a way to come around this issue?

Thanks in advance.

[vladimir_krastev]

Hi it is a bit difficult to tell what is your testing scenario. I made a small gif image with what I think you are doing. Please check it and get back to the thread:

[jbrasmartins]

Dear Vladimir,

Thank you for your reply, but probably I wasn't clear enough. Sorry for that.
In order to ilustrate what I'm talking about I've also made a GIF animation with a clear understanding.

So, quick explanation, this is an object with several separate elements inside. I've applied a material to it, with a UVWmapping, and in the material you can see I have pluged to the diffuse map the VrayUVWrandomizer.

I've rendered it once, and after I've modified the object deleting some elements of it. I've rendered again and, in the overlap, you can see the diffuse map moves from one render to the other... Would be helpful if it stay int the same place, although you are deleting some elements of the object...

In this example I'm using cubes, but it can be quickly translated to a window frame with diferent mullions for example, or a beam with diferent elements, like I've mentioned previously. If the client ask us to delete some elements, and if the diffuse slot moves, the render will be diferent and that could be an issue.

Please let me know if you can see the GIF or if I should send it to another source.

Thank you in advance for your reply.

Link to the GIF: https://drive.google.com/file/d/1GLh...ew?usp=sharing

[vladimir_krastev]

Hi it won't work with deleting parts of the model and randomize by element. You can modify parts of the model but not delete them and you will be ok.

[jbrasmartins]

Dear Vladimir,

Thank you for your reply.
Are you planning to update it, in order to include the "delete" option?

It would be wonderful, as there is the case many times...

Thank you in advance.

[Joelaff]

Rather than deleting the polygons you could drag them away so they are out of the camera view.

Keep in mind that max does not deal well with objects very fast away from the origin. So don’t drag them too far away.

You could also try a multi sub object and set the polygons you wish to delete to as different material Id. Then set the opacity of that material to make it invisible.