Terrible render quality on high render size

[Anonymous]

Hi everyone,

So I have been trying to render my drawing on high quality but it doesn't work.

I have tried to render the image on 5100x3300 300dpi for 10h but the quality is terrible with a lot of black dots (see attachment). The one minute render on low quality came out much better. Not sure what goes wrong here?

I have never tried to render images on high quality before.

Thanks for your help.

[Alfred.NESWADBA]

Hi,

>> render my drawing on high quality

My personal experience is to ignore the "high quality" option, low or mid with more passes results in better quality with less time.

High quality seems to only be better for glass and reflections (not sure).

- alfred -

[Anonymous]

So I let it run overnight (12h) on a lower size (1920x1080) and this is the result.

Still not sure what goes wrong here.

[Alfred.NESWADBA]

Hi,

>> So I let it run overnight (12h) on a lower size (1920x1080) and this is the result

Having set the quality to "High"? Then turn it to low or medium, then let it render again.

If you have set it to low then please upload the dwg-file + the materials mapping files if used so we can look into it (to see more details about geometry, materials and lightning).

- alfred -

[nrz13]

I had the same problem on my more recent renderings, but setting it to High (By Level) was my solution.  It starts really grainy, but gets cleaner with each pass until the grain is a very subtle texture in the final pass.  I have not had any luck with timed renderings in any recent version of AutoCAD.  Here are the rest of my settings; maybe one of the other adjustments would help you: