Difference between revisions of "BlendLuxCore FAQ"

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(I can not enable the BlendLuxCore addon, it shows errors)
(I can not enable the BlendLuxCore addon, it shows errors)
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'''For Windows users:'''
 
'''For Windows users:'''
 
* Make sure that you have installed the [https://www.microsoft.com/en-US/download/details.aspx?id=40784 Visual C++ Redistributable Packages for Visual Studio 2013]
 
* Make sure that you have installed the [https://www.microsoft.com/en-US/download/details.aspx?id=40784 Visual C++ Redistributable Packages for Visual Studio 2013]
* If you use v2.1alpha0 or later, you will also need the [https://aka.ms/vs/15/release/vc_redist.x64.exe Microsoft Visual C++ Redistributable for Visual Studio 2017] and the [https://software.intel.com/sites/default/files/managed/59/aa/ww_icl_redist_msi_2018.3.210.zip Intel C++ redistributable]
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* If you use v2.1alpha0 or later, you will also need:
 +
** [https://aka.ms/vs/15/release/vc_redist.x64.exe Microsoft Visual C++ Redistributable for Visual Studio 2017]
 +
** [https://software.intel.com/sites/default/files/managed/59/aa/ww_icl_redist_msi_2018.3.210.zip Intel C++ redistributable]
  
 
If this does not solve the problem, browse the [https://github.com/LuxCoreRender/BlendLuxCore/issues?q=is%3Aissue+label%3Ainstallation installation issues] in the bug tracker to check if your error message was already reported.  
 
If this does not solve the problem, browse the [https://github.com/LuxCoreRender/BlendLuxCore/issues?q=is%3Aissue+label%3Ainstallation installation issues] in the bug tracker to check if your error message was already reported.  

Revision as of 19:51, 2 October 2018

Frequently Asked Questions

I can not enable the BlendLuxCore addon, it shows errors

For Windows users:

If this does not solve the problem, browse the installation issues in the bug tracker to check if your error message was already reported. If it was not reported yet, open a new issue and copy the error message from the Blender console (on Windows, click Window -> Toggle System Console in Blender's menu. On Linux, start Blender from a terminal and try to enable the addon, then copy the error message from the terminal).

See the installation page for information on how to install, update and remove the BlendLuxCore addon.

Why is my HDRI environment black and not showing up?

You probably have other very bright light sources in the scene, for example a sun or a sky lamp.

Solution: raise the gain value of the area or HDRI light source that is black. The gain value might need to be very high, e.g. 100000.

Why is my area lamp black?

See #"Why is my HDRI environment black and not showing up?"

When I change the brightness of my lamp, nothing happens

You are probably using an automatic tonemapper which adjusts itself to the changed brightness, making it seem like the brightness did not change.

Solution: Use a non-automatic tonemapper (camera settings -> ImagePipeline).

When I make one of my lights brighter, all the other lights get darker (or vice versa)

Similar to #"When I change the brightness of my lamp, nothing happens".
You are using an automatic tonemapper which tries to keep the image at the same brightness, making it seem like the brightness of the lamps changed.

Solution: Use a non-automatic tonemapper (camera settings -> ImagePipeline).

A material/object appears to be flickering when I move the camera and shows artifacts in final render

This effect is called Z-fighting and is usually caused by mesh faces being exactly on top of each other, e.g. two planes on the same world coordinates.

Solution:

  • Check if there are two objects on top of each other, e.g. because you duplicated the object, cancelled the transform and forgot about it.
  • Check if the mesh has duplicate faces. Enter edit mode and use the Remove Doubles button in the Tools panel, which might solve the problem in some cases.

Duplicate faces are often caused by extruding, cancelling the transform and forgetting about it.

An object that I set to "smooth shading" looks like it is shaded flat in shadow penumbras

This artifact is called "terminator problem".

Solution: Unfortunately there is no real solution. You can only try to mitigate the effect by subdividing the geometry further and/or increase the size of the light source that is causing the problem.

Getting Help

If none of the above entries helped to solve your problem, consider asking in the user support forum or filing a bug report.