Print at Jan 18, 2022, 7:46:19 AM

Posted by db4tech at May 22, 2010, 2:23:36 AM
Re: Simulate sun position and lights/shadows
I've still not managed to get a slightly shiny floor yet.

Here is how the same scene renders with the 3 different shaders.

For reference. Normal Advanced photo render version 1.2 (Shiny shader)


Phong shader


Uber shader


Uber shader seems to be badly affected by the room ceiling light, the problem disappears if the ceiling light is turned off (Emmanuel is this with Importance sampling turned on?) Phong shader is slightly affected by the ceiling light.

Here are my findings so far (apart from the floor) with Phong and Uber shaders all items that should be reflective are even more reflective, notice the knobs on the unit and strangely the curtains?

Apart from the obvious ceiling light issues, both Phong and Uber shaders render all lights used in a scene with a brighter intensity than Shiny shader, Phong slightly brighter and Uber very brightly, notice the window frame and chair reflecting brightly the lights illuminating the scene placed behind the virtual visitor.

Render speeds:
Shiny shader is the fastest
Phong and Uber about the same, sometimes Phong was faster, other times Uber was, it was too close to call without carrying out some accurately timed renders.

More tests to follow.
db4tech