# Transparencies

**Transparencies**

**Standard transparency shading is "baked" on the surface**

By default, V-Nova PresenZ will not go through a transparent object in the detection phase.\
This will end up baking what is seen through the transparent object onto its surface.\
For instance, a window surface will feel like a "poster" of the background.

By default, the baked on the surface combined with Deep reflection/ stereo works quite well for complex refractive objects like the water drop, a frosted window, a vase, etc., because the objects’ curvature distorts most of the refractions. It also works well for faraway windows.

![](/files/7uaplOrSBmI4tFfX4cAA) ![](/files/abM2BS6ojMtKKuWFakoG)

**When to use Glass tagging**

But for close and flat transparent surfaces like a nearby windows, this poster effect will be weird.\
We need to have parallax on what is seen behind the window.\
\
Tagging the transparent surface as "Glass" will solve the issue.\
With this tag, V-Nova PresenZ will keep the reflection component of the tagged surface and start to scan and capture what is behind it. This cancels the poster effect because PresenZ then captures in 3D what is behind the glass-tagged surface in the 3D scene.

Some examples below where glass tagging the nearby transparent objects is mandatory

![](/files/QugPonL8Wmc8nTONB9zK) ![](/files/9qT8jcz7yvNMU8oT7l71)


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