Hope you can help me with some issues I've been dealing these days.
As I'm rendering products, most of the time I need to render some transparent materials in order to do a post-pro in Photoshop, change the backgrounds, superpose images, etc.
I've been looking for an answer but yet I've couldn't get a solution for this problem.
I need to render materials with transparency and no background in Cycles.
I've found that there are two ways to do this:
- Render with transparency in the materials.
- Render and get two renders, the original and another one only with the alpha channel to edit in Photoshop.
For the first option, I've achieved to render a glass-like material, as PET plastic using this node tree:
For the second option, I haven't found a way to get the alpha channel in cycles that includes the object with transparency and, if possible, the shadows in the background| but without the background.