Hello
I try to make a realistic roof but can’t get displacement to work for the material even if I have it in a separate component. I have displacement on under settings, any other settings I can have missed?
If someone have any tip on making a better roof I’m happy for ideas.
Hi,
You said that displacement surfaces are components. Well.
A couple of things to verify:
Are surfaces “white” or “blueish”? I mean, when watching in monochrome SketchUp style. They must be “white”, you must keep the main surface oriented to the displacement direction.
Are displacement switch (in settings-> switches-> geometry-> displacement) on?
It can be a matter of displacement texture map size.
regards.
Hi,
It’s a matter of relative dimensions of roof bitmap and displacement bitmap. Must have the same relative dimensions.
You can test this on the roof texture
1.- Duplicate your roof material (right button on Asset editor) and select this new material roof#1 in Asset editor
2.- Create a new diffuse layer above BRDF
3- Assign your displacement bitmap to this diffuse layer.
4- Select transparency to white (or select a color map on opacity to white) on this new diffuse layer
5.- On SketchUp material change dimension of this new material. As you said 305x305.
6.- Select Objetcs in scene with original roof material
7.- Apply new material to selection.
8.- Render
Regards
I have create the new material in Vray editor but I can’t get the material to the Sketchup material,
Save and close file and open file again. It should appear on SU materials
If I save the file the new material disappear from the Vray material editor.
It seems to be a bug. But anyway, create a new material with the same settings of your roof material and try to do the steps above except duplicating. Let’s see if works, it must.
Maybe displacement amount is too low, try to increase. Think about difference between black (0,0,0) and white (255, 255, 255) in displacement bitmap in inches and put this value in displacement value. Test values 18 or more to test and see what happens.
That switch is on, here is the complete model.
https://drive.google.com/a/3dhus.se/file/d/1D7S3qwaQHyNITFR-XF2WLH2IVT1Gndzt/view?usp=sharing
Strange things happen with disp.
First of all, I’ve made a rectangle 10mx10m, white face up.
I’ve imported a bitmap (the roof displacement map in this post) over the white face of rectangle.
Modify this roof material adding the same map to displacement (amount 20 for test)
Group rectangle surface and border lines
Render… no disp effect
WHAT??? WHY??? I don’t know. Until yesterday I did it like that. It worked for me in previous versions and I think with this release as well.
I made another rectangle same dimensions
Grouped surface and border lines
Applied roof material to the group (from outside the group)
Render… WORKS!!!
I used this first method for years because it’s the easiest way for adjusting textures on surfaces.
I tried again applying several materials on surface from inside the group keeping the roof disp bitmap, and disp geometry is still working works again, but I can’t easily adjust the disp map position
It seems that disp bitmap affects only to the group for geometry, but not for materials from inside the group. I don’t know if this is the way to do it from now or a bug.
Tested with W10, SU 2017 and 2018, VfS 3.06.01.
Regards.
Yes, I think that 4 or 5 is enough for your texture map. But I appreciate that someone from Chaos should tell us something about this displacement behaviour.
Hi Pablo,
First of all, I’ve made a rectangle 10mx10m, white face up.
I’ve imported a bitmap (the roof displacement map in this post) over the white face of rectangle.
Modify this roof material adding the same map to displacement (amount 20 for test)
Group rectangle surface and border lines
Render… no disp effect
The workflow that you’ve described should work without any issues.
On the other hand there are edge cases in which the displacement might not work when applied to faces.
The thing is that in V-Ray (Core) the displacement can only be assigned to geometries and not to materials while from a user standpoint in SU it’s the opposite.
Because of that the following behavior can be observed:
> Every group or component definition in SketchUp becomes a single V-Ray geometric object after you hit the render button (and can only use one displacement)
> If there are multiple materials applied to faces in the same definition V-Ray uses a single Multi-material applied to the definition to distribute the materials
> If any of the face materials (sub materials) has displacement chances are that all the faces in the group might or might not be displaced. There is always one sub material controlling the displacement effect per definition (it’s ‘randomly’ picked)
> If you want to ensure that a specific material controls the displacement of a group you can just apply it to the group. The materials assigned to faces will still take care of the texture placement
To make things more visual I’ve recorded the following video:
We will do our best to improve the displacement workflow with future updates.
I hope that the information here will help you manage displacement more easily.
Best regards,
Konstantin
I think this has always been the case. You must assign the displacement material to the group and not only to the faces within that group.
Best,