[Example] V-Ray Displacement

thomthom · 4 Mar 2011, 08:14

Use a layer blend mode so you mix the shades of the underlaying layer. Or render out the image in mulitple passes which you can overlay.

simon le bon · 4 Mar 2011, 09:05

Hi guys,
Sorry for disturbing: I don't know nothing about Vray..

But I find Displacement incredibly amazing.

simon

pyroluna · 11 Mar 2011, 14:08

Thanks Thomthom! Very helpful!

arail1 · 19 Mar 2011, 03:08

Very frustrated.
I'm trying to learn a bit of Vray before my demo expires, then I'm back to modo until some more $$ comes in.

I can't seem to get displacement to work. Is there a global switch somewhere that I'm overlooking? I've downloaded all of the files in this thread, opened them without changing any settings and I get nothing.

Any ideas of what I'm doing wrong or what I'm not doing?

Thanks

3deviator · 19 Mar 2011, 06:12

@arail1 said:

Very frustrated.
I'm trying to learn a bit of Vray before my demo expires, then I'm back to modo until some more $$ comes in.

I can't seem to get displacement to work. Is there a global switch somewhere that I'm overlooking? I've downloaded all of the files in this thread, opened them without changing any settings and I get nothing.

Any ideas of what I'm doing wrong or what I'm not doing?

Thanks

hello arail1, i dont know if this works for you, recently I play vray displacement on grass. And accidentaly found out this settings for grass displacement. I used vray 1.49.01 demo, and heres my settings.

I use the grass textured (attachment no.1) in the difuse layer and the displacement attachment no.2
Then in my material editor, at Maps, load the displacement file (attachment no.2) then adjust the U & V equal to 2.0, then check the invert box as shown in picture 7,
After that, I adjust the displacement multiplier to 5 and the edge length to 3.0 as shown in pictures also. (picture 4)
Then in the V-RAY OPTION. go to Displacement menu then adjust the amount to 2.0 and edge length to 5.0. (see picture 5)
finally hit render botton.
I attached also the output of that settings (picture 6), and some other output, i just change the amount of displacement and edge length.

Thats it, hopefully this will help you.
Cheers!

Krisnel

arail1 · 19 Mar 2011, 19:46

Thanks 3deviator -

I dragged some displacement maps I use in modo into my SketchUp scene and now I have displacement. I assumed downloading some of the files from this thread and hitting Render without doing anything else would work but for some reason it doesn't, not sure why. But whatever, I seem to have overcome the problem.

thomthom · 20 Mar 2011, 00:05

Make sure you group the faces with the displaced materials.

mingjae · 10 Apr 2011, 14:30

hi thomthom,

I want to ask the basic pattern of displacement map,
is it extrude the black colour and nothing in white?

what about if i use a coloured jpg image as displace maps
eq, using the same jpeg image in diffuse and displacement maps
is it displaced?

i already try bump maps , make more realistic in texturing, but not more realistic if i render the corner of a room with applied 30x30 tiles on it (look realistic on the texture but not at the edge/ corner at the tile)

maybe, can u share step by step the setting of doing this rendering corner of a room with 30x30 tile? thx

SU 8+vray 1.49.01

valerostudio · 21 Jun 2011, 14:20

I remember reading something about a 'trick' to get displacement to calc faster on a final rendering. Does anyone remember the process. It had something to do with running the rendering with displacement off and then saving the IR and LC maps and then re-running the rendering? It was supposed to increase render times dramatically.

andybot · 21 Jun 2011, 21:14

That's pretty much it. If you only have a few materials with displacement, you can turn of the disp. map for those materials and run a render at 1/2 the final resolution (height and width), then saving the LC and IR maps. Then change your settings to render LC and IR map from file, change resolution back to full res, and turn back on the disp. maps. The rendering should then start right into the final render pass. One warning though, there's a bug in the current version where the saved maps don't load correctly. I don't recall the workaround now, but it was discussed in the asgvis (now chaosgroup) forum. I'll post some info if I can dig it up. I think it had to do whether autosave image was turned on or not. (It needs to be turned on and a file path selected.)

Andy

fuzzion · 1 Aug 2011, 10:13

Displacement mapping made with 1.49 vfsu. Texture taken
from http://luzindirecta.luxisessentia.com/
HDRI sky hyperfocal

valerostudio · 19 Aug 2011, 18:02

Did we ever figure out the workaround for the 1/2 res LC IR saving in 1.49.01?

bhbarchitects · 19 Aug 2011, 19:14

The scene that ThomThom has been good enough to supply has a link to the displacement on a local machine.

If you save this map to your pc and then link to it, the scene should render fine.

Hope this helps

Matthew

valerostudio · 19 Aug 2011, 19:24

I might have been clear. I apologize for that. What I am referring to is the workaround that lets you rendering at 1/2 res with displace off and then you load your IR Map and LC Maps and render at full res. Andy mentions that he thinks there is a bug in the latest version that will not let you load the IR and LC maps properly. That's my issue right now.

andybot · 22 Aug 2011, 00:49

@valerostudio: I had a thread about this on the Chaosgroup forum. There is a trick that's worked most of the time - has to do with autosave. As long as you have a file name selected in the IRmap autosave slot, the saved maps seem to work.

bug and solution for indirect illumination autosave bug
(registration required)

Moderat · 5 Jan 2012, 13:34

@3deviator said:

3deviator

I followed your steps, I liked the result.
When I preview render in the material editor it looks good, but when I do a render from my scene it doesn't show the displacement.. I have this when rendering other kind of materials with displacement too. So there must be something wrong, I checked all the settings from your images with mine.. and they are the same. Any idea? Really frustrating, been looking for days now (reason why my water material isn't working properly too, see other thread).

Thank you,

Bert

thomthom · 5 Jan 2012, 13:47

Note that the material editor scene isn't well suited to preview architectural materials. When you create displacement materials you will see that the displacement amount will look different. The displacement multiplier represent inches, so calculate how big your multiplier need to be.

Then you also need to make sure that any displaced geometry is completely isolated. A geometry with a displacement material must not touch any geometry with any other material. That is very important.

andybot · 5 Jan 2012, 14:00

also, make sure also that any edges in your group do not have any other material applied. That's tricked me up once or twice...

Moderat · 5 Jan 2012, 14:11

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

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?