Object having material with a bitmap on diffuse not to be affected by scene lights?

[mrbombastik]

Hi!

I use real photos of furniture and create 3D background for them. I place the furnitures on my scene with a plane object (aligned to camera and camera match satisfied) having material with bitmaps for diffuse and opacity as you can guess the real background are cropped in PS..

 

Ok my scene has VRAY lights and VRAY render engine.. But that material having bitmaps, has to be Standart Material because as you know the opacity can not be seen for Vray Materials on viewport and that will avoid my design process.

 

What i want is that the furniture should take NO lights from scene like self illuminated materials.. i just want when i render that bitmaps is shown as just with original real photo.

 

thanks for help!

[Corey Beaulieu]

I'm not exactly sure I understand, but I think what you want is to select the planes, right click, and under the object properties un-tick receive GI cast shadows, and receive shadows. In your VRay lights, hit the Exclude button and choose your mapped plane (do this for the sun as well).You may have to un-tick Don't Affect Colors (adaptation only) in your color mapping, but tha one is a bit of a guess.

 

I will say though, If you have PS already I don't see much of a reason to render a 2D plane into your scene. You can use it to design your space in Max, but why not render your 3D without it and then comp it back in after? This would be a more typical approach.

[mrbombastik]

Corey,

Thanks for your help first..

I know compositing the final render in PS will be handy but setting up the scene lights while observing the real photo in inside the render output makes the workflow faster as you can guess. If i take the final render to PS without matching the real photo's light, it makes the things harder..

 

Actually i had tried changing the plane objects' GI properties or excluding the planes from lights before i started this thread but had no success and also after a point i was so confused with too many changes in the settings and getting no result .

 

But you made me rethink all over it and i found a solution..

Let me write this for who will face same case.

 

Well actually there is no need to turn off any GI property or exclude object from light.. Because even if you make these changes using Standart Material for the planes wont let you get what you want. Ok I know I should not use Standart Material in a VRay Scene but i had to use them just to see them with opacity map in the viewport ( Vray does not supply this)

 

So, i found an alternative way.

 

Now for example for a furniture i use two planes over eachother with exactly the same position, alignment and size.

One of the planes uses Standart Material but this is just for positioning the plane in the scene and it will be NOT RENDERABLE..(from object properties)

The second plane uses Vray Light Material with same opacity map ( Compansate camera exposure and multiply color by opacity MUST be TICKED)

This plane will be hidden in the viewport but will be RENDERABLE.. and you dont have to turn GI properties, Vray Light Material automatically avoided from any scene lights

 

Hope this will be a method for the anyone face this kind of workflow.

 

Regards..