[Example] V-Ray Displacement

thomthom · 5 Jan 2012, 14:15

Still downloading, but did you isolate the geometry? That is the most important thing to do.

Also, exactly what version of VfSU do you use?

andybot · 5 Jan 2012, 14:21

i wonder if he's confused that isolating geometry is not just having it separate but to actually make a "group" or "component" out of it. Haven't had a chance to look at the model either.

thomthom · 5 Jan 2012, 14:26

Just opened the model - looking....

(Just a note on the model in general - I purged the model. erased all the scenes. Erased everything except the test square the camera was focused on and saved it - 1.9MB ... from 40MB. Please purge your model before sharing - everything will be smaller and quicker. People find a 2MB file easier to initiate a download for rather than 40MB.)

thomthom · 5 Jan 2012, 14:29

@andybot said:

i wonder if he's confused that isolating geometry is not just having it separate but to actually make a "group" or "component" out of it.

This is true - everything was ungrouped.

Once grouped it worked fine.

(Though, I found that any geometry in the same context - connected or not - prevents displacement. Wonder if that changed since earlier versions. Before it could be in the same context. But alas not not. Complete isolation is required.)

Moderat · 5 Jan 2012, 15:38

Hi,

thank you both for helping me out. It was the group thing that caused the render to 'misbehave'
I tried it on a small patch, and it worked. But it took a half an hour to render a small piece.. so I'm not going to use it in my large scene (will take ages to find the right settings & get the final render). Very frustrating that all your materials have to be put apart from each other to get a working render.. don't see how you can get walls aligned to each other properly if you have consider this. Going to try the sea water later this evening, it's crucial to get it right for this project.

Thank you again, and sorry for the large file. Will keep it in mind for the next time.

thomthom · 5 Jan 2012, 15:44

Yea - I never liked displacement grass anyway. Just end up looking like a spikestrip.

I assign a colour to the Colour ID of the material and render out a Material ID pass which I use in Photoshop as a mask where I overlay real grass from photos.

thomthom · 5 Jan 2012, 16:32

@andybot said:

which you can see a tutorial I did a while back on that method.

Moderat · 6 Jan 2012, 01:51

Yes, seems a lot easier to do it post-rendering. Thanks, I'll be using it for my grass.

Now I've been trying again to get my (sea)water working. I managed to let vray render my material, but now it's coming out all wrong.
It looks exactly the same in the preview in material editor as in the youtube tutorial (http://youtu.be/vbHdi5bEdlI), but when rendering it comes out very pure blue and not transparent. I redid the whole process 3 times.. still the same result.
Anyone an idea? I'm really getting tired of this same kind of problem over and over again .

http://www.mediafire.com/?52she3kywadj4yz
(I copied the water to another file so my SU-file isn't too big to download. )

Now to bed! 3 am here.
Thanks in advance,

Bert

majid · 19 Mar 2012, 11:33

dear mate, do you mind to try this one?
it is just a quick tweak over glass material..... I'vnt changed the refraction IOR ( it is now 1.5 and must be 1.3 for real water) so you may yourself do it... or maybe you prefer a differend wave "size" on bumb section

waterminipack.zip

Whiteowl77 · 7 Aug 2012, 22:18

Hi Thomas, SU Modelers

I am working on an exterior Rendering of a residence and currently working on the materials and textures. I have created my own custom stone from a photo I took and manipulated in photoshop. I was able to manipulate the displacement/bump-map images needed for that as well, as I found some good video tutorials on such.
I am wondering: Are there any repositories/resources for SketchUp/Vray exterior material displacement/bump-map images (alpha channel), or does the artist need to make each one him/herself?

Can you recommend any settings for painted wood siding -- I downloaded some siding from: http://www.vray-materials.de/register_complete.php?regkey=923c1bebe6cc014330075ecca8a6f87f -- but , as mentioned above, this is formatted for 3DS Max not SU. I am trying to use it regardless to create the displacement image. I cannot get the image to tile or repeat, or any effect to take place. I dont want to use the "out of the box" siding material in SketchUp due to the continuios lines that make up the generic pattern.
Maybe, I will take the siding image texture material in SU, save it, edit it in Photoshop, and use the B&W/grayscale to make the displacement, and then leave the material fill color/diffuse a solid color, and see if that renders correctly.
Any thoughts?

Whats the best way to render/depict exterior siding?
Thanks

Andrew

broomstick · 8 Aug 2012, 12:32

Hi there! Can you tell me exactly which siding material you are trying to use? I'll have a go to convert it into vismat

penumbra · 11 Aug 2012, 18:15

@andybot. Would love to see that tutorial. Link appears to be dead?

andybot · 12 Aug 2012, 13:13

which you can see a tutorial I did a while back on that method.

Edit: updated link (I changed my blog domain name recently)

andybot · 12 Aug 2012, 16:19

Thanks for pointing that out, I've fixed it in my post.

the correct link is
http://charlottesvillearchitecturalrendering.com/?p=127

penumbra · 12 Aug 2012, 17:40

Nice site Andy. And clean tutorial. Done any work with Nelson Byrd Wolf? They are doing some landscape architectures in a couple of our projects.
Omar

krschncrlo · 18 Jul 2013, 05:21

hi, i had this problem in displacement, whenever im trying to render curves, it comes out segmented

look at the yellow pillow

jackwatson · 3 Oct 2013, 01:09

Something useful to consider when creating a displacement map, courtesy of http://viscorbel.com/vray-materials-theory/#comment-6946

"The deformations work like this – middle grey [128;128;128] of the map does not change anything on the object, darker values push the surface inwards while lighter values pull it out. The further this value is from medium gray, the stronger is the effect. Color of the map is not taken into account and only the lightness value is used."

This is good to know when you don't want the geometry created by the displacement to extend beyond the modelling you've laid out... eg bricks protruding though picture frames hanging on the wall

TedVitale_CG · 2 Jun 2014, 18:31

@moderat said:

I switched the displacement multiplier up to 50, but it doesn't change a thing.
I created a grey rectangle outside my model to check if it would work there (so it isn't connected to another material).. still the same?
Can someone check my sketchup file? Really stuck here. As far as I know I'm not using any groups for the model, maybe by accidence a while ago (been working on it for quite some time now..).
http://www.mediafire.com/?pxmhwih5p0t5li3
(if you open it, does it look like a heavy file? Sketchup blocks from time to time for a minute or 2..)

Thank you!

Bert

When sharing files, remember to use the "Pack Scene" tool in V-Rays tools. You can find it by going Plugins>V-Ray>Pack Scene. This will ensure your scene has all required materials and textures. The scene you shared does not have the associated displacement map you are using so I cant accurately test or check anything.

Also, download and try out the grass file I've attached.

Grass with Displacement