Problems getting LuxCoreRender to work on one of my computers.

In This Earlier Posting, I had written that I had used a benchmarking tool named “LuxMark”, to test whether my GPU even works, on the computer which I name ‘Plato’. In the process, I ran across the discovery, that there exists a type of rendering-engine named ‘LuxCoreRenderer’, which is a ray-tracer, but which will do its ray-tracing with code, that runs under OpenCL.

I had assumed that the benchmarking tool was free, but that users would need to be paying customers, before they can use ‘LuxCoreRender’, to render their own scenes. To my great approval I’ve discovered that LuxRender and LuxCoreRender are also, Free, Open-Source Software. :-D  But to my disappointment I’ve learned, that there is no feasible way in which I could use that, on ‘Plato’.

The reason is fairly straightforward. The devs have renamed their renderer, from LuxRender to LuxCoreRender, at which point they also carried out a rebuild of their code, so that version 1.6 was discontinued, and ‘a cleaner build’ was started, as version 2.x . In order to make practical use of a rendering engine, I need a GUI, to create scenes for that engine to render. Well, LuxCoreRender has as minimum requirement, Blender v2.79b , while the Blender-version I have installed on ‘Plato’ is only v2.78a . The requirements that the devs state is strict, because Blender versions before 2.79 contained a bug, which would cause crashes. Not only that, but in this case, a user-space application would crash, for which there are considerable processes running on the GPU, which can cause severe memory-leaks, as I wrote Here.

Now, there does exist a stand-alone version of LuxCoreRender, v2.x , which in fact runs on ‘Plato’, but which remains rather useless to me, because it can only load and then render scene-descriptions, which have been stored to a file which is totally based on Lux, and not on any other standards.

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How To Install Yafaray Under Linux

One of the computing subtopics I dabble in, is the acquisition of 3D-graphics software. Therefore, I already have “Blender 2.78a”, which has its own built-in software-rendering engine, and I have several other rendering engines installed on my Linux-based computers.

Further, the rendering engines by themselves can be useless, unless they integrate well with a GUI (such as with Blender). And so one undertaking which I’ll typically reach with a given computer, is to install “Yafaray”, which used to be ‘Yafray’, which stood for ‘Yet Another Free Ray-Tracer’. If it’s installed properly, Blender can render its scenes, using Yafaray, but from within Blender.

Yafray used to be a much simpler piece of software to install than it has become. But I’m sure the effort I put into it this evening, will be well-worth it eventually. What I’m used to doing is to download a source-tree, and if it’s CMake-based, to run ‘cmake-gui‘ on it, to custom-pick my build options, and to go. But as it happens with Yafaray, this approach led to near chaos. What this did, was to compile all the source-code properly into libraries, but then to install those libraries to nonsensical locations within my system folders. One reason was the fact that a part of the project was to create Python 3 bindings, and another was the need for the Blender-integration, where modern Blender versions are based on Python 3. In any case I was sure to install all the build dependencies via my package-manager, but doing so was not enough to obtain working outcomes.


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