How to Use Matte Material.....?

[yogeshwagh]

hi to all,

i want some help on the matte material of vray. I want to render some matte render with shadows with VrayLighting. im my scene if i use standard matte material and render with scanline it works perfectly. but if i switch over to vray with Vray Matte Surface material , the resultant output is diffrent i didn;t get a proper alpha in Vray.

so please help for it......

 

Thanks

Yogesh

[Tim Saunders]

I had this issue last week. Even though vray advertizes being seamless with max render elements, it's not quite there. I can't really complain though, the new render elements are fantastic. Back to your problem, You may have to render a second pass for your matte objects. However depending on what your rendering, that may defeat the purpose of using vray all togehter, because you may loose all your vray effects. there is probably another way around it, but nothing is coming to mind right now. Good Luck.

[yogeshwagh]

hi,

thnaks for your valuable reply to me. i want to cheat somehow to complete my project. b'cose all my basic render scene sequence is completed but now i have to put some object in the scene and some of those objects are moving.

but still i can't find any solution without matte. lets hope for the best.

 

 

thanks again ...

 

Thanks

Yogesh

[Scott Schroeder]

In the Vray properties (not the standard object properties) of the object is where you set your matte properties, there is no material like you'd have to use in scanline using this method.

 

So right click and choose Vray Properites from your quad, you may have to add it into your quad if it is not there.

 

Pretty much use the settings that are in the attached image, if you want your matte to recieve and cast proper shadows. An alpha value of -1 means it will not be visable to the alpha and vise versa a value of 1 means you will not see the object in the render but it will affect your alpha. You can choose to not have it generate or recieve GI if you so choose.

 

Note:If you do not check matte object you can still have your object not affect the alpha by simply setting it's contribution to -1.

 

Note: Under the shadows the brightness spinner controls how dark your shadows will be on the matte object. A value of 1 is pretty much black, and I tend to use a bit lighter values of .5 or .6 and control the shadows in Combustion or Photoshop.

 

Also to speed things up I almost always use just a standard vray gray (128,128,128) material on my matte objects. This way I do not have to load textures on objects that will not even be seen in the render, and the gray helps bounce some GI.

 

I know this is pretty much the surface of vray mattes, there's ton's of info on the chaos group forums and in the Vray help files. If you want more information I can give more as well.

 

Hope this helps.

[yogeshwagh]

hi,

thanks a lot .... i have used these settings it will work with my scene. but there are some problems with light matching... but i will achieve it in afx. thank you very much for your valuable and giving detailed solution.

 

Thanks

Yogesh