Sonntag, 1. April 2012

Porting a pool table model to #vray for #c4d

Finally got to work on the pool table model and ported it to Vray for rendering. DOF is very fast. I'm also moving everything to XRefs now, as the model still needs some work here or there.

A good idea might be to use different models in the XRef files - one for the simulation and one for the rendering - therefore switching off the unused one in the Master scene.

Notes on moving everything to Vray and Xref file:
  • Automatic shader translation is good for a quick start, but the shaders have to be re-done anyway, to accomodate to the Vray requirements in terms of look
  • Lighting is quite an issue, but more so on the side of C4D. The viewport will not display the brightness of a light correctly, once we don't use the C4D standard renderer anymore. This is extremely annoying.
  • I've used IES data for the first time - this is quite nice for very smooth gradients from light to dark and much better than the spot lights. Unfortunately, only a few of the studio light makers provide IES. Kinoflo has them, though - which is very helpful. Arri offers a different format (ltd). Unfortunately, the WhitHawkIES library that's downloadable from c4dcafe.com doesn't work with Vray (most of the lights simply come out black)
  • DOF renders surprisingly fast, especially when using the physical camera.
  • If the Vray physical camera gets too close, the viewport and the actual rendering start to differ. In that case, it makes sense to use the Zoom factor on the Vray phyiscal camera tag. This will be a big pain when animating the camera - it would be wonderful to have some kind of automatic correction for the Vray camera. The c4d viewport camera may not be perfect, but for image composition to always fiddle with the Zoom factor, will be a pain.
 I've made some substantial changes to the model, although they are barely visible. (New method for modeling the actual table)


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