Toon shader glossy removes direct and indirect light of diffuse shaders at low sizes with path tracing integrator #61042

New Issue

iszotic · 2019-01-31T01:19:09+01:00

iszotic commented

2019-01-31 01:19:09 +01:00

System Information
Operating system: Ubuntu 18.04.1
Graphics card: RX 480

Blender Version
Broken: blender-2.80-a1ae04d15a9f
Either CPU or GPU as rendering device

Worked: set integrator to Branched Path Tracing

Short description of error

Toon BSDF glossy component at pretty low sizes nullifies(or removes) diffuse shader and toon shader diffuse direct lighting, at low or medium sizes it removes indirect lighting. This only occurs when the integrator is set to Path Tracing

Exact steps for others to reproduce the error
In Cycles render engine

subdivide initial cube, then set to smooth shading, set light to 1000 strength
add a plane (to cast indirect light)
add material to the cube, add mix shader with a fac of 0.1, in the first slot use a diffuse shader (or toon shader with diffuse component) with a color, now for the second slot set a toon shader with glossy component, set its size to 0.001
set to render mode, the sphere should be colored but is dark with only the glossy component, when you change the glossy toon size to 0.003 the diffuse part appears but pretty dark, at 0.010 only the direct part of the diffuse shader is fully illuminated, at 0.030 the indirect part is still dark and at around 0.400 the indirect part is fully illuminated, all these were compared to branched path tracing
Glossy_toon_shader_bug.blend

**System Information** Operating system: Ubuntu 18.04.1 Graphics card: RX 480 **Blender Version** Broken: blender-2.80-a1ae04d15a9f Either CPU or GPU as rendering device Worked: set integrator to Branched Path Tracing **Short description of error** Toon BSDF glossy component at pretty low sizes nullifies(or removes) diffuse shader and toon shader diffuse direct lighting, at low or medium sizes it removes indirect lighting. This only occurs when the integrator is set to Path Tracing **Exact steps for others to reproduce the error** In Cycles render engine 1) subdivide initial cube, then set to smooth shading, set light to 1000 strength 2) add a plane (to cast indirect light) 3) add material to the cube, add mix shader with a fac of 0.1, in the first slot use a diffuse shader (or toon shader with diffuse component) with a color, now for the second slot set a toon shader with glossy component, set its size to 0.001 4) set to render mode, the sphere should be colored but is dark with only the glossy component, when you change the glossy toon size to 0.003 the diffuse part appears but pretty dark, at 0.010 only the direct part of the diffuse shader is fully illuminated, at 0.030 the indirect part is still dark and at around 0.400 the indirect part is fully illuminated, all these were compared to branched path tracing [Glossy_toon_shader_bug.blend](https://archive.blender.org/developer/F6458944/Glossy_toon_shader_bug.blend)

iszotic commented

2019-01-31 01:19:09 +01:00

Added subscriber: @iszotic

Sebastian Parborg commented

2019-01-31 12:16:54 +01:00

Added subscribers: @brecht, @ZedDB

Sebastian Parborg commented

2019-01-31 12:16:54 +01:00

@brecht bug or not?

Brecht Van Lommel was assigned by Bastien Montagne

2019-03-18 17:56:30 +01:00

Brecht Van Lommel was unassigned by Dalai Felinto

2019-12-23 16:35:17 +01:00

Philipp Oeser removed the

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Toon shader glossy removes direct and indirect light of diffuse shaders at low sizes with path tracing integrator #61042