Vray – Caustics 101
This is a tutorial that introduces you to Vray’s Caustics capabilities. Caustic can simulate how light refracts and reflects through a surface in a realistic way, casting light and shadow in a similar manner as to how it would be cast in the real world.
Let’s take a look at how to set up Caustics in 3dsmax + Vray.
off download the scene : Click here for scene.
Start max, load the scene if max asked about a missing HDR image, goto the material editor and correct the path.
I setup the scene, create a box, and a torus knot
added a spot light
- shadows on (vray shadows)
- under vray parameters check the smooth surface shadows
i’m not gonna explain everything what i did, you can see for you self if you download the scene
and render the scene out, you should have something like :
Now first off we’ll create some materials, so get into the material editor and seleect a new material, change it it vray material
- change reflection and refraction color to white
- check Fresnel reflections
- choose a very licht blue color as Fog color
- set fog multi. to 0.01
- check Affect shadows
assign it to the torus knot
now create a other material, also a vray material
for diffuse color select a light grey
and if you render you have something like this :
now we are missing the caustics, here we go:
get your vray renderer and goto vray:system
click light settings and select spot01
click “generate caustics” on
subdivs : 2500
multi : 100000.0
now go back to the render dialog and search for vray:caustic tab
multi. : 4
search dist. : 0.4
max photon : 2000
and render it out you should get something like :
to get some better caustics change to
multi. : 2
search dist. : 0.4
max photon : 2500
also change the under vray:system -> lightsettings > spot01 caustics subdive to 5000
also add a meshsmooth to the torus (render Iter. 2)
then render it out
this is gonna take long, calculating the caustics but well,
And that completes our basic Caustics Tutorial.
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Original tutorial source: Emre Goren
Categorized as Tutorials