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Hi all

I have another little for you all for a newbie to octane.

I have native c4d gradient being used in my background but sometimes it seems to start banding at the blend point. Does anyone know if there is a setting to make sure this doesn't happen? I've attached screen shot so you can see my problem.

Thanks again in advance

PG

Better to use an 16/32 bit imagetexture for background to avoid this.

Thanks again aoktar. How would I have control over the gradient by doing that? Is there a way of adding something like that via the nodes?

just to add to my last message is that it doesn't always do this which is making me think its a bug? Ive also seen Arthur Whitehead on you tube whos a big fan of using Octane use this method in backgrounds so its not just me.

pgatsky wrote:just to add to my last message is that it doesn't always do this which is making me think its a bug? Ive also seen Arthur Whitehead on you tube whos a big fan of using Octane use this method in backgrounds so its not just me.

You are running into a limitation of 8 bit color space. You can try adding noise to your gradient to help break it up, but it's a basic reality of the extreme ends of only a moderate available spectrum, particularly the dark end. Tom Scott just did a nice explainer video about it.

https://www.youtube.com/watch?v=h9j89L8 ... e=emb_logo

That's why you might want to render 16 or 32 bits/channel out of C4D/Octane, then you can choose how to tweak your color curves/noise in post to alleviate the banding.

I suspect that Ahmet's suggestion of using an actual 16/32 bit Image texture for the background will essentially add noise/dithering to the gradient in the render, so that when the render buffer is boiled down to 8 bits for saving, you don't have to mess with doing so in post. It might not give you as much control as rendering to a higher bit depth, but it is a lot simpler, and may be all that you need.

Thanks frankmci very useful info.