View Full Version : bad-looking, rendered bitmap

06-08-2010, 12:51 PM
Hi all:)

I have problem with rendered bitmap..

On my scene, I have some flat polygon with planar projection. Bitmap (jpg) have good resolution and is medium size. The part of is below:


After rendering looks in this way:


Why this happens? Thank for all suggestions:)

06-08-2010, 01:07 PM
I actually don't know but have you tried saving it as a PNG instead of a JPG? Or maybe a TGA? or maybe a 16bit file?

How are you saving the final rendered image?

06-08-2010, 01:11 PM
It's not a static picture, but a small movie, advertising. And in this moment looks very bad. But ok, I will try use tga.

06-08-2010, 01:12 PM
Just go back to the original source to save the TGA. Don't resave the JPG if at all possible.

06-08-2010, 01:29 PM
The same case... looks exacly the same. Any other suggestions?

06-08-2010, 01:33 PM
Did you try a 16bit TGA? or some other 16bit file format?

06-08-2010, 01:37 PM
I thought exactly the same thing .. now counts :) Will see.

06-08-2010, 01:42 PM
No.. the same..
But the example below indicates a problem that something is wrong with tonal ranges


But how can I resolve this?

06-08-2010, 01:44 PM
Should looks like this:


06-08-2010, 02:44 PM
It may be down to the way your scene is lit - as soon as you apply an image to a polygon it is subject to the scene's lighting conditions. Have a play with the exposure settings in the Image Viewer to get something that better suits your needs in terms of brightness and tonal range, or change the way the poly is surfaced - luminosity for instance.


06-08-2010, 02:49 PM
you said, its a small movie...
if you save it as a video file, the video codec could be causing the decrease in quality

what saving options do you use?
i recommend image sequences for movies, and later make them into a movie in some composting app

06-08-2010, 03:05 PM
Agreeing with sompson here - that does look alot like a low res/quality movie codec at work.

Back to the source and output an image sequence is definitely the way to correct this.

Nothing to do with lighting in the scene.


06-08-2010, 07:13 PM
Well, he already tried with a 16bit TGA file so I don't think it's a video file any more. :) More like a image sequence or single frame.

What are your settings for the texture that has the background image? Post some screen grabs of your texture settings.

06-08-2010, 08:59 PM
On the sky gradient picture the one above looks washed out and gray. If you want a mapped image to retain all of it's color and brightness you have to use 100% luminocity and 0% diffuse. It might not be what you want since it looses all its shading but the mapped image should remain the same.

06-08-2010, 10:04 PM
can you post your whole imageand/or scene file?

i'd like to try it...

06-09-2010, 02:50 PM
sompson - You are genius :)) Was so simple..

Changing codec resolved the problem :) Was set "Cinema codec" default if I want avi. I changed to xvid and bad tonal dissapear:)

Thank you for all the suggestions - I tried all, so not all in vain:)