Displacement Shapes
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I hadn't expected it to be that big. Somehow, the word "Guide" gave me a metnal image of a pocket-sized book. This thing is a behemoth! Hopefully this'll teach me a thing or two about V-Ray. ...but where to begin?
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I seem to have a little glitch with my vray, I have recently installed vray on my new machine and everything works great but it does not render displacement, it shows it in material preview window but not in render.
I checked the same model on an older machine and it renders the displacement fine, is there someplace I need to check to enable displacement?[edit] Figured it out, I'm having a blonde moment.
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@solo said:
[edit] Figured it out, I'm having a blonde moment.
Care to share what you'd done in your blonde moment?
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The model size on the new machine was too big so the dispacement value over the texture was reduced to a point that it was not noticable.
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@solo said:
The model size on the new machine was too big so the dispacement value over the texture was reduced to a point that it was not noticable.
Ouch... Have to admit that it also have happened for me...
Recently it happened when I tried using your Vray Grass displace model...
Didn't realize it was like 30cm grass...Aaahhh well... Good to know that I'm not the only occasional "blonde" around...
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LOL, I have many blonde moments these days, must be age.
Thomthom, I used your displacement map from your first post and tried it with Vue:
I then exported the displaced mesh and opened it in SU.
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The one I used isn't the one I posted here. I used an 32bit image, as 8bit images will have a non-linear gamma correction applied it.
How did you create the mesh? Terrain generated from bitmap?
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Yes.
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I bet it would be possible to make a whole mountain scene with a displacement map
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Another quick test.
Image made in paintshop:
Then the displacement/terrain from image:
And lastly the mesh from terraim/displacement opened in SU.
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More 'boobies'. Tried out Two-Sided material. Though, I had expected it to be more translucent. Need to revisit this one. Other tests on plain geometry gave the results I expected, this one didn't. Wonder if it's due to the displacement.
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I used your map again this time with Vray, and an American flag as a diffuse map.
It UV mapped it perfectly....hmmm.
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excellent thread.
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@solo said:
I used your map again this time with Vray, and an American flag as a diffuse map.
It UV mapped it perfectly....hmmm.
Your image seens jagged... like if there was a small displacement map applied on top of the original displacement map. Look how much more "smooth" are the "turbine" images from TomTom.
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I believe jaggin is result of ldr displacement map.
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Hey! That's great!
Thom, could you tell me, how do you create displacement maps? Is it kind of software, that converts 3D object into the map?Thanks.
Coulteri -
A displacement map is just a greyscale image (the sort of thing you can make in photoshop.) You then need a program which can use the displacement map, in thom's case, vray.
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Yes, I understand this. I just asked, if there is a method to create a displacement map from existing 3D object.... For example, if there is a ruby plugin, that is able to color the face according to its distance from zero position. Then it would be easy to export 2D raster and use it as a displacement map.
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From Ruby it's not easy to read/write to image files. There seem to be a lack of code library to deal with the various formats.
Other 3D modelling packages have this kind of feature - though I think they mostly generate normal-maps instead of plain displacement maps. AFIK there isn't any tools like this for SU.
My experiment is pretty much the inverse of what you ask for - I just drew a grayscale shape in PS and experimented with what kind of shape it'd produce.
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@thomthom said:
From Ruby it's not easy to read/write to image files. There seem to be a lack of code library to deal with the various formats.
I seem to remember reading it's because processing images is a relatively computationally intensive task, and ruby being relatively slow as it is isnt well suited to the task.
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