Help with render selected - Anti Aliasing

[amarlowe696]

Hey all - hoping to get some help with a project I'm working on. Essentially, I'm trying to achieve better results when rendering selected objects without having to go through secondary software like Photoshop. When I put all the different parts together, I'm experiencing issues with the anti aliasing impacting the borders of the image and since they are being displayed on a white background, I get white outlines. Are there some settings that I can change to alleviate this and get something closer to a result of using MatID's where AA can be turned off?

I tried turning off filtering and it did get a little better, but I feel like I'm missing something.

Thanks in advance for any help here!

[nikolay.kusht]

I did some tests on our side and merging the outputs from different objcet select render elements in Nuke seems to work fine. Things are not the same in Photoshop though. I guess that this is something to do with the pre-multiplied alpha when importing the images.

[dans]

The white background shining through is to be expected. Think about an edge pixel where 2 objects "meet". If one layer is 50% transparent there and another layer is also 50% there. The result will not be that those layers completely hide your background. The first layer will let 50% of the background color through and the layer above it will also just cover 50%. So combined 25% of the background color will still shine through.

If your objects are all rendered on a black background you can combine them using the ADD blending mode (no transparency needed).
I do not understand your goal completely, since you said "I'm trying to achieve better results when rendering selected objects without having to go through secondary software like Photoshop."

Best Regards,
Daniel

[amarlowe696]

Hey Dan,

thanks for your reply. Maybe if I explain the situation a little, it would help. Essentially, my client wants different parts of a sofa to be rendered in about 100 color options so the customer can combine all the different parts through a web interface. They aren?t happy with the white edge that I illustrated above. I?m trying to find a way to reduce/eliminate the edge without having to manually make thousands of images.

Any thoughts or advice would be greatly appreciated.

Best,
andrew