I Just noticed that if I render a simple flat white surface illuminated by a sunlight, the image is darker at borders: the wider viewing angle, the bigger is the effect
(The effect is visible in every scene, but a white surface makes it more visible).
This is a real problem for me because i need to join six images with a 90° degree viewing angle (a cube) in a spherical proiection.
Can I avoid this effect without post processing the image and without changing the viewing angle (that for me is mandatory) ?
Thanks
Image borders darker than center
Image borders darker than center
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I tried changing aperture: a smaller one isn't useful, a really big one reduces my depth of field and almost everything goes out of focus (i get a uniform blurred white image)
The only way I can imagine is to combine my white vignetted image together with the real one with GIMP, but it's hard to obtain a good result without loosing image quality...
The only way I can imagine is to combine my white vignetted image together with the real one with GIMP, but it's hard to obtain a good result without loosing image quality...
My answer was incomplete... vignetting in Indigo is not an option, although it's a physical effect it can indeed prevent stitching.
There is a tutorial in these forums (maybe it's a scene in a wip) showing how to create a latlong hdr environement output with a virtual chrome strobe, maybe you could do that and convert later to cubemap with a free app like hdrshop (if it can, I believe so) ?
Now, you can request either making vignetting an option, or adding an environment camera, wich by definition don't use vignetting... I guess the second is more popular
There is a tutorial in these forums (maybe it's a scene in a wip) showing how to create a latlong hdr environement output with a virtual chrome strobe, maybe you could do that and convert later to cubemap with a free app like hdrshop (if it can, I believe so) ?
Now, you can request either making vignetting an option, or adding an environment camera, wich by definition don't use vignetting... I guess the second is more popular
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