displacement tests thread

Kram1032 · Post by **Kram1032** » Sun Jun 01, 2008 7:58 am

this actually looks interesting

under circumstances, one'll want that step.effect. Good for artificial terraces^^

BbB · Post by **BbB** » Sun Jun 01, 2008 9:41 am

Dr. Can BI render a Z-buffer?

zsouthboy · Post by **zsouthboy** » Sun Jun 01, 2008 9:56 am

I can answer that: yep.

And it'd be much easier (granted its not hard to do) to set up than that material.

Macrob · Post by **Macrob** » Sun Jun 01, 2008 10:28 am

Displacement, bump, diffuse texture and unreal shadow

By the way: Why should I use indigo displacement instead of the blender displace modifier?

CTZn · Post by **CTZn** » Sun Jun 01, 2008 10:45 am

Wow, excellent Macrob !

BbB · Post by **BbB** » Sun Jun 01, 2008 7:32 pm

I can answer that: yep.

How?

alex22 · Post by **alex22** » Sun Jun 01, 2008 10:58 pm

http://de.wikibooks.org/wiki/Blender_Do ... /_Z-BufferHere is a short description of how to do it with composite nodes. In the screen, connect the marked Z with the input of the "map val" node. Also, connect the yellow output of the colorramp with the input of the composite node. Don't forget to select "do composite" in the render options and render once to see a preview in the viewer node!

BbB · Post by **BbB** » Sun Jun 01, 2008 11:18 pm

Alex. Would you mind giving me a screenshot?
I've never used the composite nodes and I'm afraid I've no idea what you're talking about

Macrob · Post by **Macrob** » Mon Jun 02, 2008 12:14 am

A little comparison between
- just bump (b= 0.01)
- displacement (b=0.05) and bump (b= 0.01)
- albedo texture and displacement (b=0.05) and bump (b= 0.01)

Displacementmap and bumpmap are the same file.

Kram1032 · Post by **Kram1032** » Mon Jun 02, 2008 2:09 am

BbB, in the image viewer, you actually should be able to choose the z-buffer view...
Or you simply split the Z-buffer via nodes.

The problem with that is, that it's not a per mesh Z-buffer but an overal buffer... things, further in the bg, are darker and therefore less displaced.
The buffer is floating-point so if Ono'd allow exr for disp-maps, we could even have 32bit precession

(Blender allows that since 2.46, AFAIK...)

The distance-difference shouldn't be a problem though, as you usually only take one single object for such a displacement....

alex22 · Post by **alex22** » Mon Jun 02, 2008 3:26 am

Sry forgot to insert the link. Edited it in now.

BbB · Post by **BbB** » Mon Jun 02, 2008 3:47 am

Thanks Alex, Kram. Will have a look.

EDIT: I'm definitely a Blender idiot. I get a ZBuffer image now, but Blender still saves the diffuse pass when I try to save it... This software can be unnerving sometimes...

Kram1032 · Post by **Kram1032** » Mon Jun 02, 2008 5:04 am

O.o
xD
Screenshots of Node Setup and Rendersettings, pls

alex22 · Post by **alex22** » Mon Jun 02, 2008 5:05 am

Here is an example file. Look where the composite node is connected to.

drBouvierLeduc · Post by **drBouvierLeduc** » Mon Jun 02, 2008 5:30 am

@macrob : why indigo instead of blender's modifier ? Tough question. I'll try to answer in 3 points :
-1 : I guess if you have lots of meshes to be displaced it might be easier to use indigo's displacement.
-2 : Indigo performs an adaptative subdivision, wich more memory-wise than simple subdivision. (ok, well, that modifier is in development for blender.
- 3 : because you love indigo !

Nice renders btw. Why, in your last tests, are displacements with and without albedo texture so different ?

displacement tests thread

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