When Arnold renders a refractive material, it always feels like the refractive material is not that transparent.

[66175545]

I would like to ask, when Arnold renders the refractive material, it always gives the feeling that the refractive material is not so transparent, but compare to the 02 picture (the refractive material rendered by redshift), is there any good way to solve it?

[lee_griggs]

It is because you are using scatter. 

[66175545]

Thank you very much for your kind guidance, I followed your advice and turned off the scattering of the refractive material and restored the refractive material as shown in the picture, which exhibits a dark (nearly black) edge. I have tested this before and concluded that increasing the refraction scattering value appropriately will reduce some of the refractive black edge condition. I wonder if you have a better method?

[lee_griggs]

Enabling caustics, checking the geometry normals, or increasing specular_ray_depth/transmission_ray_depth may help.

It could, of course, just be refracting black in the scene. If so, try changing the lighting/HDR map.

[66175545]

Ok, thank you very much for your careful instructions, I will try them all.