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Awesome! Thanks! <br>
<br>
<div class="moz-cite-prefix">On 11/6/2014 3:33 PM, Thomas Dinges
wrote:<br>
</div>
<blockquote cite="mid:545BDB30.10709@dingto.org" type="cite">
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<div class="moz-cite-prefix">Hi David,<br>
that is weird, I cannot think of a reason for this at the
moment.<br>
<br>
The way the feature works, is that it checks if the Light Max
Bounce setting is greater than the current bounce, if that's the
case it skips evaluating the lamp.<br>
Did you use the Pathtrace or Branched Pathtrace integrator? Also
what were your global min bounces? If they differed from the
global max bounces, it might be worth to check again with these
2 values being the same. <br>
<br>
Thomas<br>
<br>
Am 06.11.2014 um 14:00 schrieb David Fenner:<br>
</div>
<blockquote
cite="mid:CAKbJxCQwcsxmoyJDQg=fMkPfNGhYC1O=EVxVoT2JvirSR6_0Vg@mail.gmail.com"
type="cite">
<div dir="ltr">Hi Thomas, thanks for the commit yesterday, to
control bounces per light, very nice!!
<div><br>
</div>
<div>Been doing some tests here, and I ran into a very strange
scenario:</div>
<div><br>
</div>
<div>When I have 3 or more max diffuse bounces in global
render settings, reducing per lamp bounces have little to no
impact in render times, even if set to 0 bounces. However,
when I have only 2 max diffuse bounces in render settings,
lowering per lamp bounces have a very big impact on render
times, reducing them almost as much as if I lowered global
diffuse bounces on the same quantity. It's like there was
some sort of threshold at 2 global bounces. For example:</div>
<div><br>
</div>
<div>(on a simple diff scene with one lamp)</div>
<div><br>
</div>
<div>
<div><br>
</div>
<div>Global Max Diff Bounces = 0</div>
<div>Lamp bounces = 0</div>
<div>Render Time: 4.7 sec</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Global Max Diff Bounces = 3</div>
<div>Lamp bounces = 1024</div>
<div>Render Time: 10 sec</div>
<div><br>
</div>
<div>
<div><br>
</div>
<div>Global Max Diff Bounces = 3</div>
<div>Lamp bounces = 0</div>
<div>Render Time: 9.7 sec (almost the same as before)</div>
</div>
<div><br>
</div>
<div>
<div><br>
</div>
<div>Global Max Diff Bounces = 2</div>
<div>Lamp bounces = 2</div>
<div>Render Time: 8.5 sec (lower rendertime thanks to
one less bounce)</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>
<div>Global Max Diff Bounces = 2</div>
<div>Lamp bounces = 0</div>
<div>Render Time: 4.9 sec (before it didn't even care,
yet for 2 bounces and below its almost as there where no
global bounces)</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>It's great, with 2 global diff bounces and below the
gains of lowering per lamp bounces are almost as big as if
lowering global diffuse bounces, so having only a few lights
with GI can increase your rendertimes amazingly, however,
with 3 global diff bounces and over there is strangely
almost no gain, even when all lamps have 0 bounces.</div>
<div><br>
</div>
<div>
<div><br>
</div>
</div>
<div><br>
</div>
<div> </div>
<div><br>
</div>
<div><br>
</div>
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<br>
<pre class="moz-signature" cols="72">--
E. David Ferriman
Web Designer
dferriman,com
<a class="moz-txt-link-abbreviated" href="mailto:dferriman@gmail.com">dferriman@gmail.com</a> | (614) 260-7238 </pre>
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