Cycles Film Exposure not triggering Viewport update #42178

New Issue

Maverick · 2014-10-10T21:56:13+02:00

Maverick commented

2014-10-10 21:56:13 +02:00

System Information
win8 64 i7 gtx titan

Blender Version
blender-2.72-47b8bf5-win64

Short description of error
Changing the film exposure does not update the viewport.
You must get out of rendered mode and back again to trigger the viewport to update (very slow when adjusting scene lighting).

Thank you

**System Information** win8 64 i7 gtx titan **Blender Version** blender-2.72-47b8bf5-win64 **Short description of error** Changing the film exposure does not update the viewport. You must get out of rendered mode and back again to trigger the viewport to update (very slow when adjusting scene lighting). Thank you

Maverick commented

2014-10-10 21:56:13 +02:00

Changed status to: 'Open'

Maverick commented

2014-10-10 21:56:13 +02:00

Added subscriber: @dragostanasie

Maverick commented

2014-10-10 22:00:03 +02:00

Additional details: fails to update if the maximum number of samples is reached

Sergey Sharybin was assigned by Bastien Montagne

2014-10-11 15:31:15 +02:00

Bastien Montagne commented

2014-10-11 15:31:15 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2014-10-11 15:31:15 +02:00

Confirmed. Investigated a bit, Film object is tagged as needing update, but for some reason doe not affect the render... Sergey, will let this to you. :)

Confirmed. Investigated a bit, Film object *is* tagged as needing update, but for some reason doe not affect the render... Sergey, will let this to you. :)

Maverick commented

2014-10-11 16:23:15 +02:00

Hmm, this might be expensive. Unless the update is made through some kind of signal it could affect performance due to checking, updating and copying the tile buffers.

Probably the easiest solution is to just trigger a rerender rather then updating the buffers (the artists judges if more exposure is required after just a few rendered samples).

Hmm, this might be expensive. Unless the update is made through some kind of signal it could affect performance due to checking, updating and copying the tile buffers. Probably the easiest solution is to just trigger a rerender rather then updating the buffers (the artists judges if more exposure is required after just a few rendered samples).

swarfbot commented

2014-10-12 01:01:12 +02:00

(Migrated from localhost:3001)

Added subscriber: @swarfbot

swarfbot commented

2014-10-12 01:01:12 +02:00

(Migrated from localhost:3001)

The film exposure (according to me but there's a large chance I'm wrong since I'm neither a programmer nor very familiar with cycles code) is just a value passed to cycles. Then cycles passes the calculated bits to the image buffer which is displayed in the viewport. The viewport exposure and gamma can be changed by the controls under Scene > Colour Management tab. This works under blender 2.72 for me, you may want to check if it's the same for you.

blender-admin commented

2014-10-21 14:08:28 +02:00

This issue was referenced by 5e2f3c0102

This issue was referenced by 5e2f3c01028afc036545bc2a1786497816bdfdcc

Sergey Sharybin commented

2014-10-21 14:08:29 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2014-10-21 14:08:29 +02:00

Sergey Sharybin commented

2014-10-21 14:08:29 +02:00

Closed by commit 5e2f3c0102.

Closed by commit 5e2f3c0102.

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Cycles Film Exposure not triggering Viewport update #42178