Object ID questions...

[itsallgoode9]

I haven't spent a ton of time fretting over this, so maybe I've just missed the solutions...

1.Can you set custom object I'd colors or is it just chosen at random? I wasn't able to find anywhere to assign a specific object is color to each object. To get clean selections in photoshop I've always used pure R,G or B.

2.does octane allow you the option to render and save info channels as the ipr is running for a regular render? Or do I just have to do a separate render for each info channel I need? Octane is fast enough that it's not a huge deal if I have to do different renders for each channel but I feel like this would get kind of annoying to need to manually do this every time.

Thanks for the help guys!!

[TBFX]

1.Can you set custom object I'd colors or is it just chosen at random? I wasn't able to find anywhere to assign a specific object is color to each object. To get clean selections in photoshop I've always used pure R,G or B.

At the moment colours are selected through some internal scheme that we users don't have control of. I agree it would be great if we could have control but I think this is something the standalone/render engine needs before it can be added to the plugin.

2.does octane allow you the option to render and save info channels as the ipr is running for a regular render? Or do I just have to do a separate render for each info channel I need? Octane is fast enough that it's not a huge deal if I have to do different renders for each channel but I feel like this would get kind of annoying to need to manually do this every time.

No. For now there is only one image rendered or held in Vram at a time so only one pass can be rendered at a time (again an engine issue, though intentional I believe as each pass you rendered in one go would need to be stored in Vram during the render, so if you were rendering large images with many passes you could fill a significant amount of Vram quite quickly). This may be about to change with the new renderpasses feature that is promised soon but I don't know for sure how it is going to work.

T.

[itsallgoode9]

Thanks tbfk, helps me out a lot.

Just curious , but are you/is the team aware of the benefis of doing solid R,G,B object or material masks when using masks? (in photoshop, at least. I don't know about other programs).

[TBFX]

Thanks tbfk, helps me out a lot.

Just curious , but are you/is the team aware of the benefis of doing solid R,G,B object or material masks when using masks? (in photoshop, at least. I don't know about other programs).

I don't know if the Otoy devs know, though I suspect at least some do. Yes pure RGB is easiest to use in most instances but when you are doing a one click ID pass like the current Octane one you would run into issues if you have more than 3 materials or objects (depending on which type of ID pass you were rendering). Therefore if you want to keep your ID colours to just RGB or even RGBCMY it is inherently going to need some to a lot of human intervention and decision making as to what in your scene gets assigned which ID colour.

I think I like having the option of an auto system like now but it would also be great to be able to tag an object or material with an explicit ID pass colour if we so choose.

T.

[itsallgoode9]

yeah, that's what I was getting at...having it auto by default but if you want to manually assign colors, you could do that if you choose.

If want to get absolute accuracy i've always done just pure RGB colors in the past and using the channels as masks. I've tried getting accurate selections in photoshop when not using pure RGB in the past but i've never found a way to. this is especially tough when you have depth of field in your photo or when a program decides to throw two similar colors next to each other.

are there programs or plugins that do colorID selections better than what you can do in default photoshop?

[TBFX]

are there programs or plugins that do colorID selections better than what you can do in default photoshop?

I use the ID passes in compositing software and if they are not pure RGB I use keying to extract mattes which these days works pretty well with most colours as ID passes are pure flat colours and you can even separate ones that are visually very close. Again not as simple or convenient as pure RGB but if you have many ID's in a shot it's often better than doing many separate ID passes.
I'm not that familiar with good keying/selection plugins for photoshop but I do believe there are some out there.

Of course an ID matte pass that spits out a separate, appropriately named, alpha render for each object tagged as needing one would be the most versatile system, though some people may not want to deal with all of those images.

T.