Pret-a-3D opened this issue on May 14, 2012 · 8453 posts
Pret-a-3D posted Thu, 12 July 2012 at 11:01 PM
Quote - The biggest offender is the Meshlight Soft box I have, second by the Skylight and the Sunlight hardly has Anyfireflys
But with that in mind, the glossiness/specular, which, according to the video on fixing white textures, are insainly high
This is at 9 hours and 900 samples per pixel, 1000x1647px the full image
There are a couple of issues in the above statements. The Softbox is the one light that should give you absolutely no issue whatsoever so, if you have that kind of noise you have one of two possible problems:
Materials that are too bright and/or too reflective. I see everything white in your scene so that is a good indication of a problem. Diffuse colors should never be pure white and specular colors need their brightness generally well below 1/4, if there is no specular map.
High noise is often created by newcomers to Lux by occluding the passage of light, for example with a skydome or other object in front of the light, and then overexposing dramatically to compensate for the lack of light. The Autolinear tonemapper will do that and so it's best to avoid it.
Lastly, resolution as high as that is really doing you a disservice. While you gain experience with Lux you will benefit from quick turn around. Use something smaller so that it takes less time to render. 9 hours of rendering with that level of noise is not normal. You have issues in the scene. Strip it down to the bare bones, use the mesh light, not the soft box, and get to the basics. Use a simple cube scaled up to become a room, place V4 in it, add one mesh light, make sure that the light is inside the room and doesn't touch the cube. Render and see it happening in a few minutes.
Hope this helps
Paolo
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