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Groundplane with texture from evironment->screen reflects as if transparent
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  • Oujoushu
  • Posted: 09 July 2009 03:15 AM
  • Total Posts: 6
  • Joined: 27 October 2007 02:50 PM

Hello,

If you make a ground plane (for placing objects on) and set an environment map (HDRI spherical projection for instance).
And I set the diffuse for that ground plane as: environment with option screen. so that when I place an object onto the groundplane, the groundplane uses the environment as texture and is able to receive things like shadow on it.

But when I make a reflective object and place it on top of the groundplane if reacts as if the groundplane is an see-through (transparent) object.

sorry for this in 2010 thread, but i believe it is 3dsmax version consistent



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  • Samab
  • Posted: 09 July 2009 03:57 AM

And I set the diffuse for that ground plane as: environment with option screen. so that when I place an object onto the groundplane, the groundplane uses the environment as texture and is able to receive things like shadow on it.

That’s why we have Matte/Shadow and mr Matte/Shadow/Reflection materials.
What exactly is it you are trying to do?
Those reflective objects in the render look as if they are reflecting a spherical environment, as I would expect.



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The sky and the buildings they reflect is correct, but the part where they try and reflect the texture from the groundplane, (which is an environment mapping) there instead of a reflection it assumes the exact image from the environment map, which is in fact below them.

-what I want:
Is that the groundplane, like in the image takes the texture from the spherical environment map and places in on itself.
and that the objects reflect the groundplane texture and the sperical environment as separate objects.

-I’ll have a look at matte/reflection and shadow (more of vray user myself)

Author: Oujoushu

Replied: 09 July 2009 04:35 AM  
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Oujoushu

Please specify which version of Max you’re using. If it’s 2010 then this thread is in the right place.
If it’s not, please do not create duplicate threads in other forums (your duplicate in Max 2009 has been removed) as it breaks the forum rules. Simply reply to this thread an indicate that you would like it moved to a different forum and an Admin will move it for you.



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If it can be moved to 2009 version topic, it would be better (using 3dsmax design 2009),
although I can ask a 2010 user if it persists.

Author: Oujoushu

Replied: 09 July 2009 05:11 AM  
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Moved to 2009. I think you’ll find most users check all 3 main Max forums so there’s no need to multi-post.

Author: Steve_Curley

Replied: 09 July 2009 05:22 AM  
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  • Samab
  • Posted: 09 July 2009 04:59 AM

I see now, it’s a sphere and a box, not a hemisphere and plane. It’s where they reflect the ground plane, you get per-pixel mapped reflections.
With mental ray, I do this using the M/S/R material for the ground, then apply the mr Camera Map shader to the M/S/R material, that gives you proper reflections.
So, are you using Vray to render?
I know you can’t do this with scanline, but it does work with mr. I can’t speak for Vray ‘cos I dont have it. I assume it has some similar tools to the mr production shaders.



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I tried V-Ray and FinalRender, both similar effects. So i assumed it was definitely a 3dsmax thing and not a 3rd. party render engine problem.

I’ll start digging in V-ray manual for additional options for it.
I’ll post a solution when i find. If not, then I’ll have to start using MR :P

Author: Oujoushu

Replied: 09 July 2009 05:09 AM  
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  • Samab
  • Posted: 09 July 2009 09:32 PM

I think you will need another Vray user to help with this. I only know how to do it with mr.



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  • Samab
  • Posted: 09 July 2009 10:45 PM

This is it with mr. Quite simple, just copy the environment to the MSR material that’s on the ground plane.



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  • Oujoushu
  • Posted: 13 July 2009 11:50 PM

Thanks for the trouble, making a scene for me:)
Still havent figured it out for v-ray (haven’t had much time to do so, vray manual and guide aren’t as specific. It has a matte material: VrayMtlWrapper. but still doesn’t do what I want.

Mailing Chaosgroup in half an hour or so



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hi, in vray i think you have to use the override mtl and the vraymtlwrapper. in the override mtl you put your mtlwrapper as base material and in the reflection mtl you put your background mat…
in your wrapper mtl you set the option matte surface. hope this works for you…



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