2.80 Object's reflection disappears when object is behind another object (even when reflection is visible to camera) #64564

New Issue

TravLR · 2019-05-13T20:50:46+02:00

TravLR commented

2019-05-13 20:50:46 +02:00

System Information
Operating system: Windows 10 x64
Graphics card: Nvidia Geforce GTX 1060

Blender Version
Broken: 05f1451d72, blender2.7 branch, 2019-05-22 (example: 2.80, edbf15d3c0, master, 2018-11-28, as found on the splash screen)
Worked: N/A

Short description of error
BEHAVIOR
When I'm in camera mode and looking at an object with Screen Space Reflections on, the reflection disappears when there is an object in front of the object bearing the reflection. Even if the reflection is still visible to the camera, the area where the foremost front is covering the object behind it causes the reflection to disappear. I've included a sample file as well as a screenshot. This also shows in the final render.

EXPECTED BEHAVIOR
Even if there is an object in front of another object from the camera's view, the reflection should still show if it is in view of the camera.

sample-file-with-issue.blend

Exact steps for others to reproduce the error

Create a 2nd cube, then place behind the default cube. Create a plane for the floor
Enable "Screen Space Reflections" in the render settings
Switch to camera mode and position the camera so the default cube is in front of the rear cube
For contrast, change the color of the cube that's behind the default cube making it easier to see
Press Z and choose "Rendered" view. Observe results.

**System Information** Operating system: Windows 10 x64 Graphics card: Nvidia Geforce GTX 1060 **Blender Version** Broken: 05f1451d7248, blender2.7 branch, 2019-05-22 (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen) Worked: N/A **Short description of error** BEHAVIOR When I'm in camera mode and looking at an object with Screen Space Reflections on, the reflection disappears when there is an object in front of the object bearing the reflection. Even if the reflection is still visible to the camera, the area where the foremost front is covering the object behind it causes the reflection to disappear. I've included a sample file as well as a screenshot. This also shows in the final render. EXPECTED BEHAVIOR Even if there is an object in front of another object from the camera's view, the reflection should still show if it is in view of the camera. [sample-file-with-issue.blend](https://archive.blender.org/developer/F7034188/sample-file-with-issue.blend) ![screenshot-of-issue.png](https://archive.blender.org/developer/F7034201/screenshot-of-issue.png) **Exact steps for others to reproduce the error** 1. Create a 2nd cube, then place behind the default cube. Create a plane for the floor 2. Enable "Screen Space Reflections" in the render settings 3. Switch to camera mode and position the camera so the default cube is in front of the rear cube 4. For contrast, change the color of the cube that's behind the default cube making it easier to see 5. Press Z and choose "Rendered" view. Observe results.

TravLR commented

2019-05-13 20:50:46 +02:00

Added subscriber: @TravLR

TravLR changed title from ~~Object's reflection disappears when object is behind another object (even when reflection is visible to camera)~~ to 2.80 Object's reflection disappears when object is behind another object (even when reflection is visible to camera)

2019-05-13 20:52:04 +02:00

Marco commented

2019-05-13 21:13:09 +02:00

Added subscriber: @nacioss

Marco commented

2019-05-13 21:13:09 +02:00

Changed status from 'Open' to: 'Archived'

Marco closed this issue

2019-05-13 21:13:09 +02:00

Marco self-assigned this 2019-05-13 21:13:09 +02:00

Marco commented

2019-05-13 21:13:09 +02:00

This is how Screen Space Reflections work in Eevee and in any other real time render engine, it calculates the reflection based on the what is already visible in the view.

TravLR commented

2019-05-13 22:03:09 +02:00

Be that as it may, it's unrealistic. That makes it an issue for me, personally. Ultimately, I'm saying the bug is that the viewport is displaying unrealistic reflection results, and I still feel that's a bug that should be fixed.

Marco commented

2019-05-13 22:10:39 +02:00

It's surely not a bug, said that, there is a new technology called Real Timer Ray Tracing that involves real path tracing in real time and super optimized developed by Nvidia. It's still an emergent technology and it works only in the latest Nvidia GPUs and it is still not implemented in many software. You will never get an equal result between a path tracing engine (Cycles) and a real time one (Eevee), but you can get close using Reflection and Irradiance probes.

TravLR commented

2019-05-13 22:14:45 +02:00

Understood. Bug was a poor choice of words on my end; rather, an issue. I'm not saying I have the solution (I'm a creator, not a developer), but as a creator, it's problematic for me to design a scene and not have reflections showing realistically. I understand I'd have to use Cycles for the realism I'm looking for, but of course I'm losing the benefits of real-time rendering and the speed of Eevee. I suppose I'm asking for my cake and to eat it, too. :)

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2.80 Object's reflection disappears when object is behind another object (even when reflection is visible to camera) #64564