White Rabbit

final_comp.jpg

this guy is my first attempt at rendering hair in production.
Rendering hair in XSI4 (2004) wasn’t exactly a walk in the parc.
A lot of tools had to be developed inhouse especially in the shading department.

xsi1.jpg

the following is a shading/passes breakdown I did in 2004 for RenderNode, a now defunct online cg magazine.

constant pass : flat colormap transfered to hair from the skin

constant.jpg

occlusion : rendermapped skin occlusion transfered to hairs

occlusion.jpg

ambiant : ambient environment lookup (using the hair normal) of a set probe.
the shader uses spherical harmonics

ambiant.jpg

lambert : wrap lambert using precomputed deep shadow maps

lambert.jpg

skin : the shader uses the chanlum technique to compute illumination .
I used this pass to enhance the “white fur” effect.
It also creates a translucence effect in the ears.

skin.jpg

wireframe:

xsi2.jpg

Outputed in 2K for a french spoof movie.

lapin.jpg

Modelling ManuChapon
MentalRay DeepShadow shader by AloysBaillet
MentalRay HairShader by GuyRabiller

more infos about the film

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