Displacement Help

[benjamin_kohn]

Hi,

I am pretty new to all this so go slowly with me.

I have a simple test scene with a wall shape. I have selected one face and turned it into a group and then the other faces have also been made into a group. These two groups are then grouped together. I applied a Roof tile material to the single face group and a plaster material to the other group, The displacement applied to the roof tile material is causing a gap between the two groups, other than negative shift which looks a little odd what can you do to fill the gap? If I make a wall and create a group and apply the Roof tile material to the group and then apply the plaster material to all the faces other than one face to which I apply the Roof tile material you end up seeing the displacement on the plaster texture but the gap is filled.

Sorry I know that this is a confusing way of describing it so I have attached some images to show what I mean. If someone can show me the proper workflow I would be truly grateful as both ways seem flawed to me.

Thanks

Ben

[nikoleta.garkova]

Hi Ben,

Just to note that with the introduction of V-Ray 5 for SketchUp, Displacement can be added directly to a selected object (group/component) rather than applied through the material's attribute options. The Displacement attribute will be removed in a future update.

That being said, can you let me know if adjusting the Displacement's Shift value helps the situation (i.e., if you give it a negative value of -1)? Make sure that Keep Continuity is also enabled, so that V-Ray will try to produce a connected surface. This is especially useful when you get splits (around sharp edges) in the displaced geometry.

To read more about the Displacement modifier and its parameters, please visit: https://docs.chaosgroup.com/display/...P/Displacement

If you're still experiencing issues, best would be to forward a sample project through our contact form so we can investigate further. Thanks!

[Peter.Chaushev]

Hello, Ben,

You have correctly guessed that the shift parameter usually helps in this situations. It is highly situational though and in your case may not produce the desired effect.

Another workflow I can offer is the following:
1. Apply displacement on the whole object
2. In Edit Group mode set a different material to the front surface.
3. Make sure displacement's "keep continutity" option is enabled.
4. Set displacement mode to normal
5. Slot a Triplanar texture in the displacement map slot, switch its mode to use separate textures for each direction, then slot the original displacement texture within but only in one direction. You can afterwards remove the back surface of the object and group and group it with a separate surface that is not affected by the displacement.
Make sure that the displacement texture slotted in the TexTriplanar does not use a UVW Placement asset (there's a known issue involving a combination of UVW assets and displacement).

Here is an illustration of the possible end result:




Note that some glitches may still appear depending on the displacement value and texture used. This is far from an ideal solution but should work for most common cases.
I will inquire our dev team about possible improvements to displaced mesh results in cases like yours.

Kind regards,
Peter