changing texture after render

Support Materials and Textures
1

Hello

Let’s say i have short anim (cycles) with a photo on a table like this one


Can i render it, and change photo texture after the render: For instance using openEXR and compositor (map uv node) ?

My goal here is to do high quality render (that take very long) and reuse it changing photos without doing the full render.

thanks, Benoit

2

Basically you need to render the UV pass (enable Render Layers>>Passes>>UV) to use it in compositor with the MapUV node.
For better results, you’ll have to render also other passes (glossy, shadows, objectIndex etc), and play with them in compositor.

3

As Secrop said, you need to render all your passes separately to have better control of them on post-production.
Take a look at this: https://cmivfx.com/store/255-blender+3d+compositing

4

Render first time normally, then change photo image and render ONLY that image with alpha background. Might be faster to render photo image with Blender render. Finally mix 2 videos.