Saving FG and GI maps are great time savers. Also it reduces a flickering issue from an animation.
After tweaking the render settings (ready to render)
1) Go to Render Setup > Common
Set up Output Size smaller than final render image, so you can save a time. Make sure an aspect is the same. I usually use ¼ or ½ of original size.
2) Then, go to Indirect Illumination > Reuse (FG and GI Disk Caching)
Select a mode (Walkthrough or Animated Objects)
3) Check Calculate FG/GI and Skip Final Render
4) Choose Incrementally Add FG Points to Map Files from Final Gather Map drop-down menu.
5) Click … to select a file name and location
6) Choose frame type from Generate Final Gather Map File Now drop-down menu. This option is useful when you use Walkthrough mode. If you are not doing animation, just click Generate Final Gather Map File Now.
7) After done saving FG map, choose Read FG Points Only from Existing Map Files from Final Gather Map drop-down menu.
8) Before hit render, make sure changing Output Size to original and unchecked 'Calculate FG/GI and Skip Final Render'.
Caustics and Global Illumination Photon Map has same steps except without Every N frame(s) option. Because FG is view/ camera dependent and GI is not.
thanks Akikookabe thanks a lot, very good tutorial.
ReplyDeleteI'm happy to hear it helps:)
ReplyDeleteThank you Akiko Okabe! Your tutorial is very easy, clear and precise. You helped me a lot to reduce the flickering on my glass.Thank you again.
ReplyDeleteMay I ask you a couple of questions?
I'm making an architectural exterior animation with mrSUN & mrSKY of 900 frames. No other source of light. Only a camera moving along a path without objects animated.
1. At Generate FG Map File Now. Should I choose every 1/3/5/10 or 20 frames?
2.At the Rendered Frame Window. Should I check Reuse Geometry?
3.Could be possible that the whole animation will take +/- 70hours?
I would very much appreciate your help.
Warm greeting.
Alex.
I hope still it helps you.
ReplyDelete1 - It depends on a camera speed. Try render out a couple sec. using 20 and 10. If you are okay with 20 then use that setting. It helps your render time faster.
2 - I don't use it because it doesn't support a net render. (I think but I will check)
3 - It depends on your scene and what kind of quality you want. Here are something you can do.
- Lower sampling. Under render setup > sampling quality > samples per pixel. Try min 1/4 and max 1.
- Using BSP2 under render setup > render > rendering algorithms > raytrace acceleration.