vb25 - material tests

[FB3000]

Re: vb25 - material tests

yes - vray is manualy navigated to the place on disk

ps i have updated another part with translucency on first page - i have a few questions...

[Yaroslav_L]

Re: vb25 - material tests

Hello!
After reading http://www.cg-files.com/vrayglassmaterialtutorial.html
I'd try to make Glass_Clear material in vb2.55,
but get error when Refraction glossiness set to 1.0. When I change it to 0.99 - everything OK.
Log & Screen:

[attachment=0:2rayzpjc]Screen-Glass_Clear.jpg[/attachment:2rayzpjc]

found bundled python: /home/vijt/3D/vb25/2.55/python
V-Ray/Blender: Loading modules... done.
read blend: /3DArchive/Materials/vb255/vb_25_MatScene.blend
V-Ray/Blender: Special build detected!
V-Ray/Blender: Using custom operator for meshes export...
V-Ray/Blender: Exporting meshes done [00:00.42]
V-Ray/Blender: Writing scene...
Traceback (most recent call last):
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/render.py", line 2076, in render
write_scene(sce, bake= VRayBake.use)
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/render.py", line 1913, in write_scene
write_frame()
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/render.py", line 1897, in write_frame
_write_object(ob, params)
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/render.py", line 1857, in _write_object
write_object(ob,params,add_params)
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/render.py", line 1117, in write_object
ma_name= write_materials(props['files']['materials'],ob,props['filters'],object_params)
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/render.py", line 970, in write_materials
write_material(ma, filters, object_params, ofile, ob= ob)
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/render.py", line 755, in write_material
brdf_name= write_BRDF(ofile, sce, ma, ma_name, textures)
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/shaders.py", line 1266, in write_BRDF
brdf_name= write_BRDFMirror(ofile, sce, ma, ma_name, textures['mapto'])
File "/home/vijt/3D/vb25/2.55/scripts/io/vb25/shaders.py", line 1168, in write_BRDFMirror
if textures['color']:
KeyError: 'color'

location:<unknown location>:-1

location:<unknown location>:-1

[FB3000]

Re: vb25 - material tests

Hello
I've tested the file right now on mac with vb255 (vb build 33429) and the latest exporter - seems all is ok.
Do you use special build etc? isn't your renderer has self changed into vray -material preview in renderes tab?

I suggest You to copy and post It also on problem section - it will be more noticable for bdancer.

btw. here's another one tut about that:
http://www.aversis.be/tutorials/vray/vr ... liquid.htm

and some others glass tests:
viewtopic.php?f=4&t=317

[Yaroslav_L]

Re: vb25 - material tests

I'm on ubuntu 10.10. Script was updated with git pull command.
V-Ray - demo.
vb 255 33552 build by me thanks to bdancer reccomendation https://github.com/bdancer/vb25-patch/wiki/
...
And one more thing. Here:
viewtopic.php?f=8&t=418
I was read:
"Using alpha for glass is incorrect.
Use white refraction color + proper IOR + fresnel reflections (+ optional fog color for some volume effects)."
But there are no transparency for me with alpha=1.

[FB3000]

Re: vb25 - material tests

Here are the vb builds and those for ubu have different number:
https://github.com/bdancer/vb25/downloads
- i don't want to make You wrong if Bdancer gave you that 33552 build so its probably best.

You get none transparency with alpha=1 and refraction color set to white ?
- this is strange maybe your depth number is to small (works similar to yafaray's one)

and turn on affect alpha and shadows in refraction

[Yaroslav_L]

Re: vb25 - material tests

Found!!!
"Compatibility mode" was turned on!!! This option is only for old V-Ray versions.
Now everything is OK!!!
SORRY!

[FB3000]

Re: vb25 - material tests

no problem good that everything works

[Yaroslav_L]

Re: vb25 - material tests

I was found, that in some tutorials there are falloff texture in reflection slot (water or another hi-polished mats).
Has anybody some experience in it?

FB300 please - look here
viewtopic.php?f=8&t=419&p=2366&sid=60c14cf4599d7e8 40bce8212c3d9ec13#p2366
Any ideas?

[FB3000]

Re: vb25 - material tests

oh thats what for is falloff shader - can U post some links I would like to read about that?

if U are looking for it is in textures>vray>falloff

[Yaroslav_L]

Re: vb25 - material tests

For example:
(Very-very-very nice and complex mat)

[attachment=1:2sp7cxuq]Metal_Ribs.jpg[/attachment:2sp7cxuq]

[attachment=0:2sp7cxuq]max-Met-Ribs.jpg[/attachment:2sp7cxuq]

[FB3000]

Re: vb25 - material tests

Thanks Yaroslav for the link.
I must read more about that because I dont get the difference beetwen using falloff and the gradient.
Anyway vray falloff works right now and procedural blender falloff/gradient don't so maybe it is worth start using it right now.

fe. aniso - using gradient:
http://www.evermotion.org/tutorials/sho ... final-sp-1

[voytov]

Re: vb25 - material tests

..That is very helpful thread!
Many thanks!

[FB3000]

Re: vb25 - material tests

thanks, Im happy that is helpfull - there's still so many things to test

[sersia]

Re: vb25 - material tests

Thank you for your tests!!!
It helps me a lot to understand V-Ray Material.

I really appreciate it.

Best Regards,

[$asha]

Re: vb25 - material tests

g'day, how to create only specular reflection, like this
http://s1.ipicture.ru/uploads/20120128/xOTAhIMT.jpg