Force each new render into sequential render slot

Question

Is it possible to require each new F12 render to appear in a new render slot thereby not overwriting the one I wanted to compare it against?

This seems relevant: http://blender.stackexchange.com/questions/463/logging-renders — Ray Mairlot, Feb 24 '15 at 18:13
All you need to do is change which render slot you have selected, is there any reason you need to automate this? Pressing F12 and changing features is more time-consuming. — J Sargent, Feb 24 '15 at 18:14
Well... if I am working in Object mode and making changes, I frequently hit F12 to see the results. If I remembered to move to the next open slot in the UV/Image view before doing so, the render appears inthe next slot. If not, the render is displayed in the slot in which the prior render is holding, overwriting it.... — rcgauer, Feb 24 '15 at 18:16
I see, you want to default to the next empty slot. That will take some scripting, which is out of my department :/ I wish you luck, I really would like that feature as well. — J Sargent, Feb 24 '15 at 18:17
In a completely ideal new-feature world, I would love for the render Slots to be associated with the settings used to create each render... so I could make a render into Slot 1, make changes and render into Slot 2, and then move all settings back to the Slot 1 condition.... But at the moment I am just trying to render into the next open slot... — rcgauer, Feb 24 '15 at 18:18
While not automatic there is keyboard navigation of the slots - 1-8 will take you to a specific slot. That's only one extra keypress before F12. — sambler, Feb 25 '15 at 13:38

Chebhou · Answer 1 · 2015-02-24T22:19:51.940

7

here is a script that switch the render slot automatically after each render
-This is for blender 2.72 and earlier versions :

import bpy
from bpy.app.handlers import persistent

@persistent
def PostRender(self):
        bpy.data.images['Render Result'].render_slot += 1
        bpy.data.images['Render Result'].render_slot %= 7

bpy.app.handlers.render_complete.append(PostRender)

paste and run inside blender

as Ray Mairlot noted the changes in blender 2.73 and later versions require replacing render_slot with render_slots.active_index as follows :

import bpy
from bpy.app.handlers import persistent

@persistent
def PostRender(self):
        bpy.data.images['Render Result'].render_slots.active_index += 1
        bpy.data.images['Render Result'].render_slots.active_index %= 7

bpy.app.handlers.render_complete.append(PostRender)

edited Feb 24 '15 at 22:19

answered Feb 24 '15 at 18:29

Chebhou

19,533
51
98

This is the right direction. But render_slot cannot take an int it needs a render slot type. – Ray Mairlot Feb 24 '15 at 18:34
@RayMairlot so how should i do it ? also is there more convenient way to loop through the slots instead of this like slot.next() or something like that ? – Chebhou Feb 24 '15 at 18:35
2

I don't know. Did you not test the code? – Ray Mairlot Feb 24 '15 at 18:36
@RayMairlot I did and it's running fine, I thought you can help me out make it better than this ? – Chebhou Feb 24 '15 at 18:37
You can't be running that code because it should be render_slots not render_slot – Ray Mairlot Feb 24 '15 at 18:46
@RayMairlot well I guess you should try it – Chebhou Feb 24 '15 at 18:47
Let us continue this discussion in chat. – Ray Mairlot Feb 24 '15 at 18:48
This works perfectly, no errors or unexpected behavior. just run the script and you are good to go! – J Sargent Feb 24 '15 at 19:12
1

The script works for me! Renders and immediately hops into next slot. Very cool, and thank you! – rcgauer Feb 24 '15 at 19:36
1

@Chebhou Actually, I forgot, you can do just bpy.data.images['Render Result'].render_slot %= 8 – someonewithpc Feb 24 '15 at 20:13
1

Is it possible to change the slot before (at the same time) the render is launched, not after? – Bithur Feb 24 '15 at 22:39
@Bithur there is a handler render_pre() that can do that i will try with it – Chebhou Feb 24 '15 at 22:40
This does not work in blender 2.77a on a Mac as of 1 September 2016. No error, no render, no change. Command line reports only: bpy.ops.text.run_script() – Sep 01 '16 at 16:04

Force each new render into sequential render slot

1 Answers1