UV Render Channel

[Infrared digital]

Hi

I am trying to render a UV co-ordinate channel using VRay Sampler Info Tex in an Extra Tex render element but I cannot get it to show only the red and green channels - does anyone know how to do this ?

I'm using VRay 2.30.

Thanks

N

[joconnell]

Try using the samplerinfo element in max - it's got a drop down menu that'll let you pick from normals, position and uvw - you just set it to uvw and pick the channel number that you'd like to render, it'll do it for every object that has data in that numbered uvw channel.

[Infrared digital]

Ok, I'm struggling with this. There is a Samplerinfo element in VRay but where I get confused is that the geometry (there is one piece of geometry) is meant to have a gradient from red to green (no blue) so, how do I assign that to the render element ?

[Rens]

SamplerInfo set to UV mode will render the existing UV space. You can set the channel as well.

U is red, black is 0 and red is one. Same goes for V (up).

If the gradient is not what you want then you need to either move your object in UV space or assign a gradient texture to an extraTex element.

[joconnell]

Yep - might be your actual uv's on the object. If you try a simple test with a teapot primitive what does it look like?

[Infrared digital]

Thanks for your help !

I recreated the geometry and it seemed to do the trick !