Search found 7 matches

by Marko Posavec
Thu Nov 12, 2020 2:04 pm
Forum: User Support
Topic: Light cut off problem when using Bidir and Metropolis. How to fix?
Replies: 11
Views: 1275

Re: Light cut off problem when using Bidir and Metropolis. How to fix?

I tried enabling the auto smooth option under the Object Properties > Normals section, no change. Note: For time being, it's not implemented for the latest Blender versions - only works with Blender 2.83 LTS :!: Bypass - Use Edge split modifier. auto smooth alone should work, only custom normals ar...
by Marko Posavec
Thu Nov 12, 2020 2:00 pm
Forum: User Support
Topic: Light cut off problem when using Bidir and Metropolis. How to fix?
Replies: 11
Views: 1275

Re: Light cut off problem when using Bidir and Metropolis. How to fix?

Note: For time being, it's not implemented for the latest Blender versions - only works with Blender 2.83 LTS :!: Bypass - Use Edge split modifier. I tried the 283 version of blender to get the smoothing to work. But unfortunately this doesn't affect the end result. The artifact visible on the top ...
by Marko Posavec
Thu Nov 12, 2020 7:42 am
Forum: User Support
Topic: Light cut off problem when using Bidir and Metropolis. How to fix?
Replies: 11
Views: 1275

Re: Light cut off problem when using Bidir and Metropolis. How to fix?

No, I didn't, I see now the top circle artifact reflected on the sphere. I will check. It may be some kind of precision/limited color resolution problem: your "room" is a sphere too and normal interpolation may be a problem (for instance, does it happen with a cube too ?). I tried enabling the auto...
by Marko Posavec
Wed Nov 11, 2020 5:06 pm
Forum: User Support
Topic: Light cut off problem when using Bidir and Metropolis. How to fix?
Replies: 11
Views: 1275

Re: Light cut off problem when using Bidir and Metropolis. How to fix?

When the scene is contained in a cube instead of a sphere the artifact is not visible. Tried with several cube room sizes and nothing. But I can't be sure if it's not there 100%. To me it looks like it might be caused by the indirect light reflected from the metal ball somehow. Not exactly because t...
by Marko Posavec
Wed Nov 11, 2020 3:57 pm
Forum: User Support
Topic: Light cut off problem when using Bidir and Metropolis. How to fix?
Replies: 11
Views: 1275

Re: Light cut off problem when using Bidir and Metropolis. How to fix?

No, I didn't, I see now the top circle artifact reflected on the sphere. I will check. It may be some kind of precision/limited color resolution problem: your "room" is a sphere too and normal interpolation may be a problem (for instance, does it happen with a cube too ?). I did not test with a cub...
by Marko Posavec
Wed Nov 11, 2020 12:27 pm
Forum: User Support
Topic: Light cut off problem when using Bidir and Metropolis. How to fix?
Replies: 11
Views: 1275

Re: Light cut off problem when using Bidir and Metropolis. How to fix?

I knew that using mesh-lights is not super efficient but, being equivalent to using the same number of lights as triangles... that I did not expect. :shock: I wanted a sphere light for this scene so that it sends light in all directions. I did not check if a point-light could do that. Also I was not...
by Marko Posavec
Tue Nov 10, 2020 1:02 pm
Forum: User Support
Topic: Light cut off problem when using Bidir and Metropolis. How to fix?
Replies: 11
Views: 1275

Light cut off problem when using Bidir and Metropolis. How to fix?

Hello, I am new to Blender and LuxCore. When trying to render a scene with LuxCore using the Bidir Engine and Metropolis Sampling... A Light cutoff artifact appears on a Diffuse Background Surface visible in a specular reflection. I made a comparison render with the Path Tracing Engine and it shows ...