Render regions

[davegmac]

First is there a way to just load the image without having to wait for it to transform vertices, parse the scene etc? by loading from Resume from file?

In Vray I could load a render from a previous session and render regions to make adjustments without the need to redo the whole image. I am confused as to how I would do this in Corona. I thought I figured it out by loading the .cxr in from Resume from file. If I draw a render region around the area I want to fix it starts to fix it but still ghosts the old image even after waiting a really long time.

Next I tried just loading the render with Resume render from file and then stopping it. Then drawing out my region. I turned off clear VFB inbetween renders and tried to render the offending region, but while calculating the GI it alters the area outside the region?? If I draw a region and press render why would anything outside the region change?? Am I doing something wrong or is this how it works?

If so maybe I should post in "The most wanted feature from Vray" It would be nice to expand on Corona's history tab and have the ability to auto save renders to the history, as well as have it save to your project path. Then you can just reload them by double clicking.

[maru]

Hi,

First is there a way to just load the image without having to wait for it to transform vertices, parse the scene etc? by loading from Resume from file?

Currently it is not possible to just load the image into the VFB.

In Vray I could load a render from a previous session and render regions to make adjustments without the need to redo the whole image. I am confused as to how I would do this in Corona. I thought I figured it out by loading the .cxr in from Resume from file. If I draw a render region around the area I want to fix it starts to fix it but still ghosts the old image even after waiting a really long time.

That's because it continues the rendering, instead of replacing the original. This should work:
1) Use the "resume from file" option
2) Stop rendering
3) Change the material/object
4) Select a region
5) Start a new render
However if the object is affecting the GI, shadows, etc, in some visible way, then it may be visible on the regions of the border.
You can workaround this by using the "render selected" feature, which will render only the selected object, and nothing else.

Next I tried just loading the render with Resume render from file and then stopping it. Then drawing out my region. I turned off clear VFB inbetween renders and tried to render the offending region, but while calculating the GI it alters the area outside the region?? If I draw a region and press render why would anything outside the region change?? Am I doing something wrong or is this how it works?

I am not sure if I understand you correctly here, but GI is always computed for the whole scene, not just the selected area, and this is by design.

If so maybe I should post in "The most wanted feature from Vray" It would be nice to expand on Corona's history tab and have the ability to auto save renders to the history, as well as have it save to your project path. Then you can just reload them by double clicking.

Sure, you are welcome to post it here https://forum.corona-renderer.com/index.php?topic=17249.0, since the request may be easily overlooked in this topic.

[davegmac]

Next I tried just loading the render with Resume render from file and then stopping it. Then drawing out my region. I turned off clear VFB inbetween renders and tried to render the offending region, but while calculating the GI it alters the area outside the region?? If I draw a region and press render why would anything outside the region change?? Am I doing something wrong or is this how it works?

This doesn't always happen but what I found was sometimes the render outside the region would be altered. It doesn't happen if I Erase the buffer first and then resume from file.

Still just trying to learn Corona, its a little different then I am use to, but really liking it!

Thanks for your help!