Nomeradana

NOMERADONA’s Glass Tutorial
For me, one of the complicated materials in Vray Sketchup is the “glass material”. The reason is you need to fine tune the balance fresnel and refract colors of theFresnel reflection in order to have a believable glass. I am using Vray SketchUp for almost three years now since its beta stage, yet still having difficulties in understanding this type of material.Therefore, I experimented again and again in order to see how every parameters work. Until now I am still not confident enough to write this tutorial, yet I think I found some useful points which I hopewill be found beneficial to everyone. If you have a 3DMax and Vray Max user, you will realize that glass material is a bit different in Vray SU. I now therefore share some of this knowledge with youfriends. I know it’s not perfect, but I am sure it will be useful especially to the newbies.

Here is a simple SketchUp file that I will use for this particular tutorial. I created a ball using vraysphere, and a thick sheet of glass in front of this ball placed on a half covered room. The sun is coming from the right. THE GLASS MATERIAL The material of the glass I used here is a very basic blackdiffuse color with 100% transparency. It has default reflection and refraction layers.

Based on many readings and sharing from different sources, I seem to like this balance in my fresnelreflection. Fresnel Color… RGB = 210,210, 210 Refract Color….RGB = 40,40,40

Here is the sample render using the above glass setting.

AFFECT SHADOW As you can see in the above render, the sun is notpenetrating on the glass. In order to let the sunlight penetrates the glass object, we need to tick the box with affect shadow in the refraction layer. If you are using colored glass, I will advise thatyou should also tick the use the affect Alpha.

In this render the sun is now penetrating unto the glass object.

FOG COLOR To add color to the glass, I wont advise that you we will use the...