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This render i try to use an hdri image but the noise istoo much..
The same render whitout hdri in onli few second is clean..
Where i wrong??

There are a setting wrong about pathtracing option??

Please help me to obtain a clean image..please!!!

ther's not anyone can help me?

HDRI goes like this
The more blurry it is the less artefacts you get

Try that, open the HDR file in Photoshop, do a small gaussian blur, save the HDR with the hdrname_blurred.hdr
Reload the blurred HDR in Octane, try to render and compare the two renders.

I don't understand very well..

The noise due to hdri?
If i do a small gaussian blur in final image i have a clean image?

Thanks

Hi,

The higher amount of noise is due to bright areas on the HDRI map.
A small amount of reflected rays find these bright spots,
giving more variance/bright contributions.

The solution is to let it render a little bit longer.

I need to develop more advanced algorithms in the near future that make situations like this less noisy.

Radiance

thanks to all
i try to do what you say me..

I forgot to say i used demo v0.7

If you can, try and apply a Gaussian filter the HDR map you want to use. This should theoretically smooth out those problem spots!

This is a trick I used to use in LW, processing options which meant I didn't have to destroy or make a new HDR

@Radiance: Would be neat to have an option to blur and to edit the hdr-range (clip) of the background image inside of octane. This will help tweaking rendertimes.

i could add a button to clip it, but clip where ?
it depends on the average intensity i guess...

i'll think about it.

EDIT: one thing to remember is that when MLT is available all these issues are suddenly less important.

Radiance

I quickly knocked up a preview showing a normal HDR image vs Gaussian HDR image.

Having controls would be great, but I'm sure you have tonnes on as it is...