Transparent BSDF node :
The transparent shader can make your object invisible in rendering. It only has one input: Color. An RGB value of 1,1,1, pure white, will make it 100% transparent, all values in between true white and pitch black will be influencing the material in
terms of transparency (brightness)
and color modulation (hue /saturation).
The transparent shader is not physically correct, so in photo realistic renderings it will usually be mixed into the material by a factor. One example would be a leaf texture. Nobody will examine every single leaf on a tree, so it’s worth cheating a bit to save computing power. You can use a
texture where there is a leaf on a transparent background, use the image’s alpha output as a factor for a shader mix node, to cut out the leaf of a single face, instead of modeling the geometry.

#blender
#transparent
#bsdf

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