vrayobjectproperties problem in reflection

[Okami]

Hello, i have a problem with my vrayobjectproperties node which shows almost the whole hdr in reflection instead of just my character... i've uploaded the picture for the settings..

would like to solve this without the need of using renderlayers or -element, if possible...

http://i.imgur.com/oTBvk7z.jpg

hope someone can help ..

thanx in advance

[bigbossfr]

2 solutions :
- on your material with reflection, set the max reflection distance
or
- if you set your hdr in the environment tab, on your material, add "material override" attributes, and override the environment (with a black ramp).

[Okami]

i followed both advices for 5-6 hours, but unfortunately didnt help at all. Could you be more specific. you meant "dim distance", or ? i checked it and tried all values from 1 to 100 and even more.. but nothing happened. the 2nd solution also didnt help. There must a solution within vray, or ? ( p.s. i am a big fan of your deeX tool by the way. Still looking forward to buy Arsenal soon. )

[bigbossfr]

Can you show us the material on your ground please ?
Where did you connect your hdr ?
On your ground, normally, you have a material (hdiSetupGroundShader). If you check the dim distance (in reflection) on this material, and set a value to 0.001 for example, the ground will have reflections from objects with a distance of 0.001.

[yolov]

I don't see why leaving the reflection override black won't work. What VRay version (build No.) are you running? Is it possible to share your scene?

[yolov]

I've spoken too early
Would I be right to assume that you're using a dome light with the same texture plugged in it as in the environment overrides? That would reflect on your (reflective) matte plane even if the reflection override is black.
This will be a bit tricky to get in one pass. I'd suggest this:
- leave the reflection slot in the environment overrides black
- clone (copy) your dome light -> set up light/shadow links so that one dome light only affects your matte plane, and the other only affects everything else
- disable "affect reflections" for the dome light that affects the matte plane (so that the other objects in the scene are still affected by the same texture from the other light)

Let me know how that goes.

[yolov]

Sorry for the many posts, there is just one more thing to add. The above will work only if none of the non-matte objects in the scene are reflective, because then they will reflect the matte plane, that will return the black reflection environment override.
So the addition is - to set a material override for the matte plane's material and put the HDR in the reflection override there.

Let me know if any part of all this is not clear enough.

[bigbossfr]

A simple distance reflection will not work ? ^^

[Okami]

@ yolov: .. unfortunatly it didnt work .... i followed all your instructions.

I cloned the domelight and then lightlinked both, one to the matteground and unticked affect reflections AND one to the character and left everything ticked ( affect diffuse, reflection and spec ) then i went into the mattegroundplane-shader and added a vray material override in the attributes, scrolled down to the extra-vray-attributes-tab and put the hdr in the reflection environment slot... i left under the vray rendersettings/Environment tab all the slots empty and black.. the results are here...

http://imgur.com/Bn7RYd8&HTYuJWY#0

http://imgur.com/Bn7RYd8&HTYuJWY#1

It would be too cool to share the scene. 'Cause i can't seem to get this fixed by myself. No Matter how hard i try. Guess i am still not in the advanced Level.

How or where could i send it to you.. ?

P.s. at least i managed to make the Reflection less sharp. I got it from Jeremy Birn's Book "Lighting and Rendering". He adviced to add a bump map onto the shader of the matteobject. At least that worked already nd made the reflection more blurry as it should be.

@ deex: yeah unfortunatly setting the dim distance to a value to 0.001 or anything else just makes all reflections just disappear .. too bad that this just doesn't work. I would have solved all the problems.

[yolov]

You did all good, except the environment overrides. Only the reflection slot should be black, the background, GI and refraction should have the HDR connected.
And yes, if you could share your scene, it would be easier. But first try the hdr in the environment, except leaving the reflection slot black.

[Okami]

Ok, i put additionally the same hdr in the Background -, GI and Refraction texture in the Vray Render Settings Environment Tab ( as seen in the image below ) The matteground plane still appears, but this time even without the reflection of the character.


http://i.imgur.com/7wZ4L8i.jpg

[Okami]

I'm trying right now to solve the whole issue with a second plane with a mirror/chrome shader. And just ticked the dim distance Option. The scene units are set to cm. The Character is suppose to have realworld measures ( about 10 cm ) Dim Distance ist set to 9.00 with Fall Off of 0.0. It actually works. Just dont know why it dont work in Conjunction with the VrayObjectProperties Node.

http://i.imgur.com/5VpPUv5.jpg

[yolov]

Didn't you have a reflective shader for the matte plane? It's a bit hard to guess what went wrong without having the scene.
So you found a way to solve this?

[Okami]

wow !? well i had a reflective base ground shader, but not a 2nd shader. Should i maybe use a Vray Blend Material as a 2nd more reflective Shader. With a Mirrorlike Shader and a Base Shader for the Ground ? No i still havent found a solution. Would be great to share the scene and let you take a quick look if i dont bother too much.

[yolov]

Yes, that would be best, if possible. Otherwise we'll keep guessing your setup and won't be able to suggest a proper solution. So if it's not sensitive information, please share the scene - here on the forum or send it to vraymaya@chaosgroup.com (just include the name of this thread in the mail subject).