Blender Git Loki

Eevee: Cleanup & small optimization

Eevee: Add Light Threshold value

This is an important change. Starting from now, all lights have a finite
influence radius (similar to the old sphere option for BI).

In order to avoid costly setup time, this distance is first computed
automatically based on a light threshold. The distance is computed
at the light origin and using the inverse square falloff. The setting
can be found inside the render settings panel > shadow tab.

This light threshold does not take the light shape into account an may not
suit every case. That's why we provide a per lamp override where you can
just set the cutt off distance (Light Properties Panel > Light >
Custom Distance).

The influence distance is also used as shadow far clip distance.

This influence distance does not concerns sun lights that still have a
far clip distance.

---

This change is important because it makes it possible to cull lights
an improve performance drastically in the future.

Eevee: Optimisation: Bypass light power calculation when not needed

This makes quite a big improvement in my case 1.8ms vs 2.3ms for a single
area light.
This will make even more difference with light attenuation.

Eevee: Cleanup: Fix wrong sun area light power calculation

Eevee: Make sun power match cycles better.

I made an empirical test with a 100% diffuse sphere and manually tweak the
lighting power of a sun lamp trying to fit cycles and eevee the best I can.

Then I plotted the result and found a rough fit to the equation and that
seems to work pretty well.

Fix node_shader_utils: "Specular Tint" is a float (not a color)

RNA: always allow fallback from defaultarray to defaultvalue.

The python getters for the array already allowed that, but not the
actual C RNA access functions. This is inconsistent, so implement
the fallback in all cases. Now if by default the property should
contain the same value in all positions, it is not necessary to
actually use an array.

Reviewers: campbellbarton

Differential Revision: https://developer.blender.org/D3940

Cycles: Cleanup, code style

Merge branch 'master' into blender2.8

Cycles: Cleanup, code style

Py API: Fix documentation/actual behavior missmatch in gpu.matrix

Py API Docs: Fix formatting

Fix T57825: Crash when assign material

We need to make sure that all the nested node trees are localized.

Because of this reason, we need to roll back to a bit older way
of dealing with materials.

Should be all safe now with the fixes from few moments ago.

Depsgraph: Clear localization tag for CoW IDs

They are self-contained now, and should not cause any sync or
free happening when freeing them.

Tag all localized ID types as such

Remove legacy node tree localization tag

Is stored on ID level now.

Followup to the previous commit

Thought this is to be fixed in master first. Turns out, nope :)

Cleanup: Double semicolon at the end of line

Fix strict compiler warnings/errors

Merge branch 'master' into blender2.8