Fernando Alcala Fernando-Alcala
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  • Joined on 2020-07-08
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Fernando Alcala opened issue blender/blender#128819 2024-10-10 00:02:18 +02:00
Cycles: highly anisotropic volumes are problematic to render with no clamping
Fernando Alcala commented on issue blender/blender#127137 2024-09-06 00:10:17 +02:00
Restarting a Viewport View, on [Numpad .] or [Home] buttons, doesnt center the view as it used to originally.

Disable the Depth setting in Preferences → Navigation → Orbit & Pan.

Fernando Alcala commented on issue blender/blender#126924 2024-09-04 03:42:33 +02:00
Regression: Increased instability in fire simulation due to changes of default values

FLIP Fluids does not have instability, but it does have excessive damping at high timestepping. Here is 1 timestep <video src="/attachments/a2e28eba-52a2-40a1-a26c-c8d8e572e230" title="flipfluids…

Fernando Alcala commented on issue blender/blender#126924 2024-09-02 22:02:52 +02:00
Regression: Increased instability in fire simulation due to changes of default values

That's a common Mantaflow problem: stability issues with high temporal resolution.

Use Quick Liquid on the default cube and set Timesteps Maximum and Minimum to 25. This results in a…

Fernando Alcala commented on issue blender/blender#126583 2024-08-22 01:53:49 +02:00
Inconsistent texture sampling and gamma correction between EEVEE and Cycles

Set the interpolation to closest.

Fernando Alcala commented on issue blender/blender#126508 2024-08-21 02:05:19 +02:00
Cycles is extremely slow to build viewport BVH2 in some scenes

Found interesting ways to fix it.

In the simple reproduction file, set kink amplitude to 0.02 (down from 0.2). Or, set diameter scale to 0.001 (down from 0.01). The scene now builds within a…

Fernando Alcala commented on issue blender/blender#126508 2024-08-20 06:25:29 +02:00
Cycles is extremely slow to build viewport BVH2 in some scenes

Got a simple reproduction.

For the 4.1 splash screen. Setting interpolated hairs to 14 (down from 15) makes the build quick again. Or you can keep it at 15 and set the kink type to nothing,…

Fernando Alcala commented on issue blender/blender#126508 2024-08-20 01:47:51 +02:00
Cycles is extremely slow to build viewport BVH2 in some scenes

Can reproduce on Windows 10 and Ubuntu 23.10 with CPU BVH2 (I don't have enough VRAM for that scene). The main problems are the two carpets. The carpet in the camera view (Furniture → Small →…

Fernando Alcala commented on issue blender/blender#124295 2024-07-07 20:55:44 +02:00
Cycles: various curve rendering issues

I add a new here Blend file with unique scenes to produce each image in Case 4. The straight curve seems to only have the issue on CPU and only when the ray that hits the outside also hits the…

Fernando Alcala opened issue blender/blender#124295 2024-07-07 08:49:50 +02:00
Cycles: various curve rendering issues
Fernando Alcala opened issue blender/blender#124200 2024-07-04 22:06:46 +02:00
Changing a curve's material, using 3D curves, on OptiX, in viewport rendering, results in error
Fernando Alcala commented on issue blender/blender#124138 2024-07-04 21:46:27 +02:00
Cycles: While in viewport render, changing materials randomly results in curves rendering black

I didn't think about testing other BSDFs, but yes, it happens even with a diffuse BSDF.

Fernando Alcala opened issue blender/blender#124138 2024-07-04 09:49:35 +02:00
Cycles: While in viewport render, changing between materials using hair BSDFs randomly results in curves rendering black
Fernando Alcala commented on issue blender/blender#123451 2024-06-27 00:12:52 +02:00
The Huang model of the Principled Hair BSDF is too dark

No change there.

Fernando Alcala commented on issue blender/blender#123451 2024-06-26 11:29:42 +02:00
The Huang model of the Principled Hair BSDF is too dark

The two biggest changes you need to make are making the hair's radius 40um and setting glossy bounces to something like 16. You should also change Factor Min in Set Hair Curve Profile to 1 (only…

Fernando Alcala commented on issue blender/blender#123451 2024-06-25 02:47:15 +02:00
The Huang model of the Principled Hair BSDF is too dark

Commentary on the last real reference you posted. While the average pixel level is low, this is likely due to a low exposure either in camera or post-process. There are decent highlights and…

Fernando Alcala commented on issue blender/blender#123451 2024-06-23 11:20:14 +02:00
The Huang model of the Principled Hair BSDF is too dark
Fernando Alcala commented on issue blender/blender#123451 2024-06-23 06:46:47 +02:00
The Huang model of the Principled Hair BSDF is too dark

I don't think Huang has an energy problem. The specific setup that you shared happens to highlight a difference between the hair models. (all of the following images use 0.1melanin, ior 1.5, and…

Fernando Alcala commented on issue blender/blender#120550 2024-04-13 00:01:52 +02:00
Trackpad mouse input jumps when doing certain mouse operations

Can not reproduce with an external touchpad on two different PCs in Windows 10 or Linux.

Fernando Alcala commented on issue blender/blender#120380 2024-04-07 21:45:09 +02:00
Regression: The same glass shader works in different ways

The Principled BSDF went through a lot of changes. You can see this by changing the walls and floor to diffuse, the lighting in the room is the same on 3.6.5 ![4m8s 365.png](/attachments/cf537454…