problem between lights and corona light material

[glaisser]

hello guys 

well i have strange problem .....    i was having in a scene  full of objects ..... some objects ...illuminated by corona light material    Ok
and  it was working very well  until ... i put  corona  light  ..   the corona light  is not working ... even if i put max higher values  in the intensity  its still not working

when i replace it with  standard omni lights   it was working  but  the pic looks bad ...???

so any reason for that ?

FYI    the scene  was  Vray material and i converted by corona converter

[glaisser]

and also  how i can raise up the samples  so  the result rendered image  wont be so grainy ,,,,,

when i render region  while making the max sample intenesity  32 or higher   the region  become so smooth and perfect 
but when i render with same settings   on the whole  image    the whole image result  still  like grain effect on it 

like this video 

[glaisser]

why there is no body answering me ??????

[NielsH]

and also  how i can raise up the samples  so  the result rendered image  wont be so grainy ,,,,,

when i render region  while making the max sample intenesity  32 or higher   the region  become so smooth and perfect 
but when i render with same settings   on the whole  image    the whole image result  still  like grain effect on it 

like this video 

For the complete image you only let it render for 2 passes then for the region you let it render for 20 passes, it's normal that one part has less noise if it has 10x as many samples.

[glaisser]

ok then how i can adjusted for the full image 

because  when i raise up the numbers ....  i still got grainy  rendered picture

[NielsH]

Just wait longer, when you render the full image and let it render to 20 passes it looks the same as the region you rendered. This obviously takes longer than rendering a small area.

[glaisser]

there is no adjusted settings for high quality render ???

[NielsH]

Corona's default render mode is progressive this means that it'll start shooting rays and immediately display the results on screen so you get an image almost right away, this doesn't mean the render is finished, it'll just keep shooting rays and improving the quality of the image until you tell it to stop.

You can't just magically increase the quality with a slider in any renderer without it costing more time. A higher quality means that you need more samples which needs more time/computing power.

What I would suggest is that you set up your scene, reset ALL settings back to default then press render and don't touch anything for at least an hour. That should give you a decent quality image in almost all cases.