Beginning with some questions

Hi there, i’m a beginner in the blender world. I’m trying to render out with Luxrender v 0.6 rc6 a simple scene with a glass pyramid, a sun, a glossy plane and a glossy cube.
I’ve set the materials on luxrender and i’ve used the environment sunsky for lighting by the sun. I’m using the “0 - direct lighting” preset for render. What i got is a grain-full image result… really bad.
I know it’s even a stupid mistake, but i’m a beginner and i can’t find some tutorials explaining what to do in render situation with Luxrender or Yafaray or the internal engine of blender…

Other question: i’ve rendered yet a good animation of a speceship with the internal engine of blender an it seems real good but when i import it in After Effct everything becomes very pixelate… maybe you can help me.

Ops, i’ve forgot: windows vista32 (pentium4…), blender 2.49a, python 2.6.2, luxrender v.0.6 rc6

Thanks a lot guys, hope that you can give some links or explainings.

have i wrote in the wrong forum?..

there is too litle information for us to help you… starting with external render engines without knowing the basics of blender may lead to many problems… how long did your render took? what where the settings you used? etc…

As to the importing of your render in after effects, it seems a codec problem or a import problem rather than a blender problem, since you see your render correctly in Blender… maybe you should try blender compositor instead! Once again… to litle information for correct evaluation of the problem!

Nuno Estanqueiro

Thanks Nuno,
i beleive all render settings are the same as default cause i haven’t touch nothing in luxrender render menu, just select the “direct lighting” preset. All i’ve done is assign materials to objects and set the sun in my scene as sunsky environment, than try render…
The default is:


Sampler: lowdicrepancy
Pixel sampler: lowdiscrepancy / samples:1
Integrator: direct lighting
depth: bounces 5
Volume int: single / stepsize: 1.00
Filter: mitchell


Film: fleximage
Tonemap: reinhard
Display: interval 4
Write: interval 120
Clamping: lum
colorspace: s-rgb HDTV

The render takes 4 min.


For a glass pyramid, if you want to get good caustics, I’d suggest you use the bidirectional integrator with the metropolis sampler, otherwise you’ll very probably get lots of fireflies (white dots). Don’t forget to use a depth of at least 20 for the integrator as you can quickly get long paths with such a shape.
If you use the lowdiscrepancy sampler, don’t use 1 for the number of samples, it defeats the purpose of the sampler, use at least 4, maybe 16 or 32 to get smoother results.
If your computer isn’t fast, don’t update the rendering that often, a display interval of 20 seconds instead of 4 should speed up the rendering while still giving frequent feedback (you can eventually force an update from the GUI, there’s a button at the bottom of the left panel).
And one last point, 4 minutes is really not much for the kind of scene you describe, especially with a pentium4).


Thank you very much Jeanphi! :wink:
I’ll try with these settings and refer my results.