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New material for speed
Posted: Wed Jul 30, 2014 2:15 pm
by HHbomb
Hello
I just test a little thing : an object without material is calculated more quickly than an object with simple diffuse material applied.
Could it be possible to make a more simple material without displacement node to speed up the render ?
Re: New material for speed
Posted: Thu Jul 31, 2014 10:01 pm
by Karba
HHbomb wrote:Hello
I just test a little thing : an object without material is calculated more quickly than an object with simple diffuse material applied.
Could it be possible to make a more simple material without displacement node to speed up the render ?
Even if you don't apply any material to an object, default diffuse material is used. speed mostly depend on material type (specular renders slower) and overall material brightness.
Re: New material for speed
Posted: Sat Aug 02, 2014 2:50 pm
by HHbomb
Karba, I do not agree...
I made some tests.
Same scene one with default diffuse (DD) and one without material assigned (NM)
Diffuse : DD=49s / NM=44s
PMC depth 4: DD=54s / NM=50s
PMC depth 12: DD=2mn13 / NM=1mn55
renders are EXACTLY the same for DD and NM (open and compared in photoshop)
so ?
Re: New material for speed
Posted: Mon Aug 04, 2014 2:28 pm
by HHbomb
bump
Re: New material for speed
Posted: Mon Aug 04, 2014 6:44 pm
by glimpse
HHbomb, does that 10% really matter?
developers already have a huge list of things to code..
what exactly You want - how to get fastest speed (for test scenes)?
Re: New material for speed
Posted: Tue Aug 05, 2014 2:27 am
by HHbomb
@Glimpse.
For a lot of people, 20% slowdown is enough to go back to 1.2 and cry everywhere in the forum... even if they have net render, displacement,hair and fur,... I thought that 13.57% (yes) speed gain would be a great benefit... And I would like to know why there is a such a time difference.
Re: New material for speed
Posted: Tue Aug 05, 2014 8:30 pm
by Karba
HHbomb wrote:@Glimpse.
For a lot of people, 20% slowdown is enough to go back to 1.2 and cry everywhere in the forum... even if they have net render, displacement,hair and fur,... I thought that 13.57% (yes) speed gain would be a great benefit... And I would like to know why there is a such a time difference.
The more complex material you use the slower render is. (using textures, mixes, emissions, mediums and so on).
In your case geometry is very simple, that is why you can sense this speed difference. Once you add more stuff to the scene, the speed difference will disappear.
It is very rare when you have very simple diffuse material for the whole scene.