Announcement

Collapse
No announcement yet.

Vector Displacement

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Vector Displacement

    Dear Chaos Group Support Team,

    I am trying to use Vector displacement with V-Ray.
    I got this example but I couldn't get a right vector displacement.

    http://www.spot3d.com/vray/help/200R...splacement.htm
    Example 8: Vector displacement

    Please check this image.

    Click image for larger version

Name:	vectorDis.png
Views:	1
Size:	263.4 KB
ID:	873085

    I just turned on "vector displacement" in VRayDisplacementMod.
    And the image for vector displacement is .exr 32bit file format.

    I just tryed to use same image in V-Ray for Maya. Please check below image. I just changed the mode to vector displacement.
    It looks better than V-Ray for 3ds Max.

    Click image for larger version

Name:	vectorDis_maya.png
Views:	1
Size:	126.4 KB
ID:	873086

    I have no idea what I am doing wrong for this.
    Could you give me a hint to make a image for vector displacement and use it?


    Thank you for your support in advance.

    Best Regards,
    Sangho Jung.

  • #2
    Have you tried using a regular 3ds Max Bitmap texture, just in case?

    Best regards,
    Vlado
    I only act like I know everything, Rogers.

    Comment


    • #3
      Originally posted by vlado View Post
      Have you tried using a regular 3ds Max Bitmap texture, just in case?

      Best regards,
      Vlado
      vectorDisMap.zip

      Yes. But there was same problem with 3ds Max Bitmap texture.
      I just attach the Vector dis Map if you don't mind please try to test it.

      Best Regards,
      Sangho Jung.

      Comment


      • #4
        Here is a short tutorial on rendering vector displacement from Mudbox with V-Ray for Maya; in 3ds Max, since we don't yet have the absolute vector displacement mode, you'll have to multiply the texture by RGB 0.5, 0.5, 1.0 and add to it RGB 0.5, 0.5, 0.0. You may also have to switch the green and blue components.

        http://www.spot3d.com/vray/help/maya...splacement.htm

        Best regards,
        Vlado
        I only act like I know everything, Rogers.

        Comment


        • #5
          Hi Vlado,
          out of curiosity....why is vray for maya in some features more advanced than the version for max???
          for example this vector displacement thing??? its been in max quite long...
          THanks!
          Martin
          http://www.pixelbox.cz

          Comment


          • #6
            There is no particular reason; some features are first requested in Maya and it is easier for us to have them implemented and tested there before moving them to other packages. Same with other features which are easier to develop/test in 3ds Max.

            Best regards,
            Vlado
            I only act like I know everything, Rogers.

            Comment


            • #7
              ok thanks for explanation!
              Martin
              http://www.pixelbox.cz

              Comment


              • #8
                Originally posted by vlado View Post
                Here is a short tutorial on rendering vector displacement from Mudbox with V-Ray for Maya; in 3ds Max, since we don't yet have the absolute vector displacement mode, you'll have to multiply the texture by RGB 0.5, 0.5, 1.0 and add to it RGB 0.5, 0.5, 0.0. You may also have to switch the green and blue components.

                http://www.spot3d.com/vray/help/maya...splacement.htm

                Best regards,
                Vlado
                Thank you for the tutorial. It is perfect information to use the vector displacement with V-Ray.
                I really appreciate it. Everyone will love to get the information.

                Best Regards,
                Sangho Jung.

                Comment


                • #9
                  I have similar problems
                  Click image for larger version

Name:	vray_vector_disp.jpg
Views:	1
Size:	25.3 KB
ID:	844498
                  On the left - desired mesh (made in mudbox and checked with mudbox by sculpt by texture)
                  in the middle my current result
                  on the right - basemesh (although I suppose it should work with plane - because it was baked to plane)
                  Here is openExr
                  I've made this "RGB 0.5, 0.5, 1.0 and add to it RGB 0.5, 0.5, 0." equation by vraycombtex and checker with specific color.
                  I don't know how to switch channels.
                  I tried many combinations with vrayhdri, bitmam and vraydisplacementmod but I am still getting this errors.
                  What I am doing wrong? channel switch?
                  gomo.pl

                  Comment


                  • #10
                    Eureka!

                    Click image for larger version

Name:	mudboxVecDisp_001.JPG
Views:	2
Size:	22.6 KB
ID:	844747Click image for larger version

Name:	mudboxVecDisp_002.JPG
Views:	2
Size:	21.3 KB
ID:	844748Click image for larger version

Name:	mudboxVecDisp_003.JPG
Views:	2
Size:	37.3 KB
ID:	844749Click image for larger version

Name:	mudboxVecDisp_004.JPG
Views:	2
Size:	63.4 KB
ID:	844750Click image for larger version

Name:	mudboxVecDisp_005.JPG
Views:	2
Size:	22.0 KB
ID:	844751

                    Found it from that scene uploaded by someone nicknamed Alvarezcb:
                    http://dl.dropbox.com/u/11943709/Mud...splacement.zip

                    I used the ear vector displacement supplied by Beige on another thread here:
                    http://www.can-con.ca/temps/ear_tan_vdm.exr.zip
                    Last edited by jstrob; 07-12-2011, 08:43 AM.

                    __________________________________________
                    www.strob.net

                    Explosion & smoke I did with PhoenixFD
                    Little Antman
                    See Iron Baby and other of my models on Turbosquid!
                    Some RnD involving PhoenixFD

                    Comment


                    • #11
                      I think it just don't work and hope it would be fixed in some service pack.
                      gomo.pl

                      Comment


                      • #12
                        If you look again at my precedent post you will see it works. You just have to output your vector displacement to look the same as the ear vector map I supplied the link to.

                        Or try those settings in mudbox:
                        Click image for larger version

Name:	map_extraction_options.png
Views:	1
Size:	58.4 KB
ID:	844757

                        limit of 5 images by post... so these one got lost:
                        Click image for larger version

Name:	mudboxVecDisp_006.JPG
Views:	2
Size:	25.2 KB
ID:	844758Click image for larger version

Name:	mudboxVecDisp_007.JPG
Views:	2
Size:	38.2 KB
ID:	844759
                        Last edited by jstrob; 07-12-2011, 08:44 AM.

                        __________________________________________
                        www.strob.net

                        Explosion & smoke I did with PhoenixFD
                        Little Antman
                        See Iron Baby and other of my models on Turbosquid!
                        Some RnD involving PhoenixFD

                        Comment


                        • #13
                          Thanks, look promising.
                          I didn't tried this "average" adjustment, I'll try that.
                          gomo.pl

                          Comment


                          • #14
                            It works indeed, although I've used vrayHDRI as a bitmap source due high values which were clamped by default bitmap input.
                            I've rescaled the values in Processing / Overall Mult. to 0,01 and then raised vray displacement amount by multiplying by 100.

                            Thanks again for the solution.
                            gomo.pl

                            Comment


                            • #15
                              Originally posted by G0M0 View Post
                              It works indeed, although I've used vrayHDRI as a bitmap source due high values which were clamped by default bitmap input.
                              I've rescaled the values in Processing / Overall Mult. to 0,01 and then raised vray displacement amount by multiplying by 100.

                              Thanks again for the solution.
                              What do you mean by "rescaled the values in Processing / Overall Mult. to 0,01". Do you have a screen shot of that operation?

                              I still get some small artifacts at UV seems. Di you find any solution for these?

                              __________________________________________
                              www.strob.net

                              Explosion & smoke I did with PhoenixFD
                              Little Antman
                              See Iron Baby and other of my models on Turbosquid!
                              Some RnD involving PhoenixFD

                              Comment

                              Working...
                              X