Different 'seed' values do not yield different noise patterns when using cycles texture bake #41873

New Issue

Martijn Steinrucken · 2014-09-19T18:44:14+02:00

2014-09-19 18:44:14 +02:00

System Information
Windows 8, gtx650m

Blender Version
Broken:2.71 official
Worked: (optional)

Short description of error
Different 'seed' values do not yield different noise patterns when using cycles texture bake

Exact steps for others to reproduce the error
Create a plane with a cube on it and add a sun light. Do a 'combined' bake on the plane with very low samples. Once thats done, change the seed value and do another bake to a different texture. Then compare textures, you will see that the noise pattern is the same.

**System Information** Windows 8, gtx650m **Blender Version** Broken:2.71 official Worked: (optional) **Short description of error** Different 'seed' values do not yield different noise patterns when using cycles texture bake **Exact steps for others to reproduce the error** Create a plane with a cube on it and add a sun light. Do a 'combined' bake on the plane with very low samples. Once thats done, change the seed value and do another bake to a different texture. Then compare textures, you will see that the noise pattern is the same.

Martijn Steinrucken commented

2014-09-19 18:44:14 +02:00

Changed status to: 'Open'

Dalai Felinto was assigned by Martijn Steinrucken

2014-09-19 18:44:14 +02:00

Martijn Steinrucken commented

2014-09-19 18:44:14 +02:00

Added subscriber: @CountFrolic

Brecht Van Lommel commented

2014-11-09 03:36:29 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2014-11-09 03:36:29 +01:00

This should be trivial to fix by using kernel_data.integrator.seed for baking. For example like this:

        /* random number generator */
-       RNG rng = cmj_hash(offset + i, 0);
+       RNG rng = cmj_hash(offset + i, kernel_data.integrator.seed);

This should be trivial to fix by using `kernel_data.integrator.seed` for baking. For example like this: ``` /* random number generator */ - RNG rng = cmj_hash(offset + i, 0); + RNG rng = cmj_hash(offset + i, kernel_data.integrator.seed); ```

blender-admin commented

2014-11-11 13:53:01 +01:00

This issue was referenced by 63d0197f9b

This issue was referenced by 63d0197f9b5bcb2f1a46366ab3753c2c57b2220c

Dalai Felinto commented

2014-11-11 13:54:17 +01:00

Changed status from 'Open' to: 'Resolved'

Dalai Felinto closed this issue

2014-11-11 13:54:17 +01:00

Dalai Felinto commented

2014-11-11 13:54:17 +01:00

Closed by commit 63d0197f9b.

Closed by commit 63d0197f9b.

Dalai Felinto commented

2014-11-11 13:56:04 +01:00

Thanks for the report, fixed on 63d0197f . Thanks @brecht
(I also included the fix in the - not currently used - differential code)

For the records, an easy way to test this is to change the seed and uncheck the 'clear' option.

Thanks for the report, fixed on 63d0197f . Thanks @brecht (I also included the fix in the - not currently used - differential code) For the records, an easy way to test this is to change the seed and uncheck the 'clear' option.

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Different 'seed' values do not yield different noise patterns when using cycles texture bake #41873