ray tracing optimising - faking it

General Forums Blender and CG Discussions
1

Here are two renders that i did testing materials one with ray tracing
the other with ray tracing turned off

what Im wondering though I probably know the answer is that why is
there such a difference in the lighting conditions (rays give more
detail longer calculation) can lighting be made so the the 2 behave the same…

http://www.sononix.com/files/images/ray.jpg

The problem I see is that it could take you a long time setting up a
ray traced render are there any ways of speeding ray tracing up ie
reducing the number of rays(cant see the control if there is one)

are there any other techniques that can simulate this and or speed it
up – I need to find out more details if I wanna animate

tks
M

2

They are called buffer shadows. They fake what raytracing does better with shadows - check the light panel.

Envmaps can work instead of raytraced reflections in some situations.

The raytracing in Blender will be optimised so no more rays are used than are necessary. Fewer rays and it would not work correctly.

Alex

3

ray tracing fires one ray per pixel. if you have OSA on you will fire that number of rays per pixel and blend them. One way to speed it up may be to lower the depth of reflection or refraction.

4

http://wiki.blender.org/index.php/Manual/Rendering