This is most likely a stupid question, but when I render something (only doing single frames at the moment, no animations) onto a size significantly greater than the default 800x600 (such as 1440x900 or 1280x800), jagged edges become noticeable, whereas they weren’t noticeable on 800x600. Aspect ratio is still 100x100, anti-aliasing is on, and I have tried improving various quality factors, but with no success. Any ideas?
Are you sure you’re viewing the bigger images at 100% zoom. If they’re bigger than your screen resolution they will be scaled to fit which will look jagged but in fact the full size image is perfectly smooth.
Upload a full size image somewhere so others can check on their screen.
Hi ardee,
You were right, it was just the way the render was displayed. After saving the rendered image and viewing it at full view, there were no noticeable jagged edges. I knew it was a stupid question.
Now that that’s out of the way, I was wondering what the “maximum” achievable image quality is that is not unnecessarily maximal (where by “unnecessarily maximal” I mean having no discernible quality improvement over the next best possible quality level), because at the moment my image, despite having no jagged edges, has suffered a bit in quality. It was mostly fine at 800x600, but at 1440x900 it wasn’t. It was saved as a jpeg image with a quality level of 100, with OSA turned on at 8, and … well, everything else is default I believe. I’m guessing the thing would be to save it as a lossless image type (such as TIFF, I guess?) at an OSA of 16?
I’ve also read that the Blender internal engine may produce lower quality renderings than some other render engines, such as YafRay (but, that, on the other hand, this may just be due to the tendency for Blender to be used by newcomers to 3D modelling). So what’s the case about this?
Another thing: one quality issue that appeared not only on the 1440x900 size but also on the 800x600 size was noticeable “boundaries” of light levels, created by a lamp shining across a plane (no, not an airplane, just a flat plane). i.e. The light-to-dark gradient [cast from the lamp onto the plane] was not “smooth”.
I’ll probably try to find my answers if no one responds, but I’m not sure how easy they will be to find, so any help with this stuff would be great.
I’m not sure why my post didn’t appear so I’ll try again:
You were right, it was just the way the render was displayed. After saving the rendered image and viewing it at full view, there were no noticeable jagged edges. I knew it was a stupid question.
Now that that’s out of the way, I was wondering what the “maximum” achievable image quality is that is not unnecessarily maximal (where by “unnecessarily maximal” I mean having no discernible quality improvement over the next best possible quality level), because at the moment my image, despite having no jagged edges, has suffered a bit in quality. It was mostly fine at 800x600, but at 1440x900 it wasn’t. It was saved as a jpeg image with a quality level of 100, with OSA turned on at 8, and … well, everything else is default I believe. I’m guessing the thing would be to save it as a lossless image type (such as TIFF, I guess?) at an OSA of 16?
I’ve also read that the Blender internal engine may produce lower quality renderings than some other render engines, such as YafRay (but, that, on the other hand, this may just be due to the tendency for Blender to be used by newcomers to 3D modelling). So what’s the case about this?
Another thing: one quality issue that appeared not only on the 1440x900 size but also on the 800x600 size was noticeable “boundaries” of light levels, created by a lamp shining across a plane (no, not an airplane, just a flat plane). i.e. The light-to-dark gradient [cast from the lamp onto the plane] was not “smooth”.
I’ll probably try to find my answers if no one responds, but I’m not sure how easy they will be to find, so any help with this stuff would be great.
Blender’s internal renderer is built for speed over quality
it is possible the get high quality renders from the internal renderer but if you are using ray tracing
- Yafray and other external renders are more accurate
I’m not sure on what the maximum size of the render Blender can produce but I remember some company rendering elphants dream at a massive 4000px or something
there is a script to produce really large renders (if you are interested in rendering that large, search the forums and you’ll find it)
as for increasing the size and lowering the quality (the light to dark gradient)
that would all depend on how the scene is set-up, are you using raytracing or buff shadows etc
But usually this is the case
the larger the render the higher the quality all the settings will need to be because what can not be noticed in a small render suddenly becomes as big as a house
can you post a screen shot or render of what you are trying to improve and we can help
(but post it as a new question)
It’s fine, I think I have it figured out now. Most of the image displays fine, except (i) the rough gradient area, which I agree is probably the way the scene is set up (perhaps it’s because the gradient is so flat; I’ll try increasing the number of shades), and (ii) a few blurry areas that pop up after saving it as a jpeg image (which I suppose might be partly due to (a) the fact that it is a jpeg, which means some quality loss … no surprise, since I’ve noticed quality loss in TIFF-to-JPEG conversion on much smaller images that weren’t using Blender, (b) it being on the “rough” gradient area I described). I’m sure I’ll be able to fix this up. Thanks for the help.