Can Vray render in greyscale?

[ken28875]

Hello everyone,

Is there a way to render an image in greyscale without the textures? I have textures applied on the a model, but want to see the render only in greyscale without obviously replacing all the textures with a gray color.

Thank you!

_KN

[dkendig]

Re: Can Vray render in greyscale?

At the moment, no, there isn't a greyscale output option. You can easily make any image greyscale using a 3rd party solution like Photoshop, The Gimp, Paint Shop Pro, etc. If the budget is tight, and you can't afford to shell out the cash for Photoshop, The Gimp is free http://www.gimp.org/

[40th]

Re: Can Vray render in greyscale?

you can make desaturated/greyscale image with monochromatic mode via V-Ray frame buffer. Just press on that button and save as you normally do...

[dkendig]

Re: Can Vray render in greyscale?

:P Oh yeah, the frame buffer... ::hands in his developer card and walks away in to the sunset::

[jrharvey]

Re: Can Vray render in greyscale?

:P Oh yeah, the frame buffer... ::hands in his developer card and walks away in to the sunset::

Actually if you save the file, it will still be in color. Not sure why. Maybe a bug?

[aufifillah alwi]

Re: Can Vray render in greyscale?

:P Oh yeah, the frame buffer... ::hands in his developer card and walks away in to the sunset::

ROFL!

[40th]

Re: Can Vray render in greyscale?

:P Oh yeah, the frame buffer... ::hands in his developer card and walks away in to the sunset::

LOL

[40th]

Re: Can Vray render in greyscale?

:P Oh yeah, the frame buffer... ::hands in his developer card and walks away in to the sunset::

Actually if you save the file, it will still be in color. Not sure why. Maybe a bug?

You're right John, I tried now and it saves as a normal RGB image... I think it might be a bug

[Jackson_cg]

Re: Can Vray render in greyscale?

I thought was what it was supposed to do, no? The buttons on the Frame Buffer are just to toggle the display, whereas the VFB Channels rollout menu actually controls which channels are saved out. FYI, there's no Grayscale VFB Channel available.

I've got to ask, purely out of curiosity- why would you need grayscale renders straight from V-Ray? Animation frames? It would still be very easy to use VirtualDub or similar to desaturate a film afterwards.

[kc.rkitek_cg]

Re: Can Vray render in greyscale?

I think there's a ruby script for sketchup that can 'switch' all the in-model materials to greyscale and back to the original colors. The rendered materials will be grayscale, but you would probably have to manually adjust the lighting and GI (Skylight) to make them appear grayish. To fine tune your sun/sky color, look at the the turbidity and ozone values.

Ah yes...here is the info: http://forums.sketchucation.com/view...?f=180&t=12368
Apparently, it is a commercial script and costs $4.
It is for sale here: http://www.smustard.com/script/GreyScale

[dkendig]

Re: Can Vray render in greyscale?

There is an override material option in the V-Ray for Sketchup render options. It assigns everything a default Diffuse material, and you can pick the color. I would call this a post render operation though, and just do it in an image editor, it would take 30 seconds at most to convert an image to greyscale, and you can set up batch processing or macros to do more than one image if you need to.

[ken28875]

Re: Can Vray render in greyscale?

Hi guys,

Thank you very much for all your replies.

Sorry, my bad, I should have given more details on what I meant by rendering in greyscale when I started this topic.

For example: the model is textured and lit. If I render I will get an image in colors with the textures. I want a render in greyscale as in flat colors from black to white, without the textures. It's like you render your model with a grey flat color and no textures. I am looking for an option to turn off the textures when rendering.

Jackson: The reason why I need a greyscale render is to study the lighting . It is easier to see the contrast/light and shadows without the textures. Also, it is a fast and efficient way to overlay textures on the greyscale image in Photoshop to have different options that are close to the final Vray render before rendering the real one in Vray with all the textures applied.

Hope my explanation makes sense. :P

Have a terrific day!

_KN

[ken28875]

Re: Can Vray render in greyscale?

Hi dkendig...just saw you post. Maybe that's what I am looking. Will give it a try. Thanks!!

[Jackson_cg]

Re: Can Vray render in greyscale?

As V-Ray's blended diffuse bitmaps override SU's materials I'd be surprised if that ruby script would create grayscale V-Ray renders- it probably just affects SU's viewport display and image export. Just a heads up.

[davidmurphy991]

Re: Can Vray render in greyscale?

Ken,

Under the Global switches tab click overide materials.....................you can put a grey material here and it will render your scene in grey.........hope this helps.....

zzzSPUDzzz