procedural texture and Reflection Glossness of VRayMtl

[flat]

sets 2D procedural texture(ex:checker, Noise) to Reflection Glossness of VRayMtl, it does not work.
Only a Flie node works.

Is this the specification of V-RayMaya?

[t.petrov]

The problem is that by default the alpha channel is used, when you connect a color texture to a single number attribute.
But for all textures the alpha is black by default. To fix the problem you can enable the "Alpha is Luminance" option for the texture.
It is a bit annoying but works.

[flat]

Thank you for the pointing out.

I was 3dsMax thinking.
Thinking is used as a node base.

[UdushKudush]

The problem is that "Reflection Glossness" is float data, texture is vector type data, and most procedural textures in maya do not have "Alpha is Luminance" attribute.
You can connect "outColorR" to your float attribute.
Actually you can use any "outColor"R, G or B, or pass it through the luminance node

[flat]

Thank you for Mr. UdushKudush and the pointing out. (and Mr. t.petrov )
It solved.