|
|
Topic: QMC sampler as global quality control
posted by Vlado
archived on 15.8.2003
You can use the QMC sampler as global quality control, particularly the "Early termination" parameters.
for lower quality:
....increase the Amount
....increase Noise
....reduce Min samples
for higher quality:
....decrease the Amount
....decrease Noise
....increase Min samples
These controls have effect on everything: dof, GI, glossy stuff, area lights etc.
Color mapping mode also affects render times and sampling quality, since VRay tries to distribute samples based on the final image result.
The images below have the same subdivs for DOF (10), GI (50 subdivs, Direct), glossy reflection (50 subdivs, no interpolation), area light (10 subdivs) for all images. Notice how changes in the QMC sampler parameters affect the image quality and render time:
click image to enlarge
The early termination algorithm allows VRay to shoot less rays than the full amount specified for a given value (gi, glossy reflection etc), if the result is "good enough" and adding more rays makes little difference in the final result.
The "Min samples" option controls how many samples (rays) will be taken before the early termination algorithm kicks in. More samples allow for a more accurate guess as to whether a value is "good" or not.
Best regards,
Vlado
> print this entry
|
 |
|
|
