Lightmix pass blending with previous render with denoising

[iainbanks]

Hi guys,

I have a problem in Corona 1.6 and 1.61 where on a certain scene if i do a render and i haven't cleared the frame buffers previous render, the new render blends 50% with the old.  I can do x number of passes and it is still 50% there.

Any ideas?

Cheers

Iain

[Ondra]

hi,
do you have denoising with amount set to cca. 0.5 enabled?

[iainbanks]

Hi Ondra,

I've looked a little more into the problem and it is only visible in th Lightmix pass with denoising enabled. 

I render the scene and allow for 5 passes, then hit stop and allow it to denoise.  I then change camera and hit render again without clearing frame buffer and it mixes 50% (or so) with the previous render (5 passes) until the point when i hit stop and it denoises.  After denoising has finished only the new render is visible.  However if i hit cancel instead of stop on the 2nd render i'm left with a mix of both renders.

The denoising amount seems to control the percentage that it is mixing too.

Thanks

Iain

[Ondra]

ok, and the beauty is fine during this? Or the same problem happens there as well?

[maru]

Similar to this? https://forum.corona-renderer.com/index.php/topic,15941.0.html
Also https://forum.corona-renderer.com/index.php/topic,16411.msg103718.html#msg103718

[iainbanks]

Hi Ondra - The beauty pass is unaffected, only the lightmix pass.

Maru - Yes i believe those post are related to the same problem.

Thanks

Iain