How do implement material without a texture image? I am trying to implement the material on the object, such as the picture below, without the texture image. I've looked for a function called "Bump Node" to implement the material, but I'm not yet proficient in this, so it's hard to solve the problem. Is there a way to implement a material without a texture image only in a geometry configuration? Or, there is other ways for solve this problem?

*I'm going to make translucent material. So I don't think it's right to use texture images.



+(no texture image appears on my object.)
Image texture is just a storage of information. In your case, a normal map will suit for 100% sure.

I use the polymer gun grip material for it, you can find it here



Basically you can do almost any materiel in Principled BSDF now.

You will need a normal map to fake the wavy surface. Connect that image texture to a normal map node to control strength. The connect it to Normal socket. The Transmission should be 1.0 in your case, and the main Roughness should be around 0 as well.