LuxCoreRender Forums

why the caustics are not reflected in the mirror again! They are called SDS paths (Specular-Diffuse-Specular) and not even normal bidirectional path tracing can render them. The are very hard to render light paths. You need to use the under development v2.3 and to enable PhotonGI caustic cache like...

The problem i'm mentioning is very obvious. please just open the file switch to viewport render and just change render engine from luxcore to cycles and back. See the speed in convergence. As written above: https://forums.luxcorerender.org/posting.php?mode=quote&f=4&p=18452#pr18444 RTPATHCPU is use...

Dade wrote: ↑

Mon Dec 09, 2019 3:54 pm

The problem may be in BlendLuxCore, it seems to set the "gain" value with the "color" for spot lights

It looks like BlendLuxCore multiply the scalar gain for the color and export everything as a gain value.

The problem may be in BlendLuxCore, it seems to set the "gain" value with the "color" for spot lights

Just export the scene and check the properties, they seems to show this problem. This behavior clearly breaks all the above discussion.

chafouin wrote: ↑

Mon Dec 09, 2019 1:55 pm

- You have two pieces of code, one using color.Y() division, one that doesn't, and both render identically. There is obviously something wrong in there, or am I crazy?

It doesn't make very much sense, can you post your test scene so I can check if there is something going wrong ?

Note that shader are the same. Does Cycles have Russian Roulette ? Anyway, an analysis must start from simple cases: use a point light and use direct light only (and don't run the test for only 7 seconds or even a microscopic difference in export/start up time can make a huge difference in only 7 s...

Ok thanks. I love the results luxcore produces, it reminds me of Corona, I really wish there was a official plugin of Corona for Blender and not just the community made on that lacks a lot of stuff. Luxcore is really fast in F12 render in OpenCL pathtracing, especially for interior renders. However...

Is your area light "invisible" ?

chafouin wrote: ↑

Mon Dec 09, 2019 1:49 pm

Of course I can see it it the math, that's what I've been trying to explain. I mean visually.

Sorry, I was writing the answer and the incomplete post got posted by accident.

Top is using Gain, bottom is using Power. Renders using Power are slightly brighter because I couldn't find what mesh light size to use to get identical brightness (using 0.5m here). 1m^2 so the division by area becomes a division by 1 I don't see where the blue light gets a 10 times intensity boos...