3.7 lighprobe reflection cube map – HDRI reflection

attempt 2

Linke to blend file:
https://www.dropbox.com/s/dtw9j5n3qiczwy7/blend.zip?dl=0

Hi Mikhail, thank you for looking into this.

There are a total of two issues that I am having with the scene.
1. Even if I remove the window the background HDR image can be seen in the reflection in the sphere.
2. The sphere does not appear in the reflection in either the green plane or the green rectangle beneath it although they are within the light probe and reflecting the room and the cube above the sphere.

I was able to resolve the differences between sneakpeak and the App Manager view by creating a new project and just starting over.

If you are willing to try….change out the HDR background to something with heavy contrast on the floor/bottom of the HDR image. The image that is reflecting in the cube is that area of the HDR.

To further simplify the project I filled the window with two faces, validated the normals were properly flipped and retested the project.

I am running this on a mac.
MacPro 2019
3.2 Ghz 16-core
192 GB RAM
AMD Radeon Pro Vega II Duo 32 GB

Giving you this in case you are running this on a PC.

Yes, I agree…that if you have black in blender and its not clipping interference then the black is a pure reflection.

In your two screen shots the green reflected cube at the bottom of each is different. This is what I am interested in fixing. Screenshot_4-2.png is what we get in Blender and Screenshot_3-2.png is what we get from that same scene in Verge.

The difference is that in the Verge3d image you can see the 4 white squares of the ceiling of the environment texture. Those white squares do not exist in side the box…but of you zoom outside the box and look at the environment above it you will find those white boxes.

So how is this happening? The green boxes in both blender and in verge are not displaying the reflection of the environment ceiling but the reflection in the sphere of the green box an plane are showing the ceiling.

This should not be happening.

Ok..
I am trying to wrap my head around what you are stating. I am sure it’s true…just not making sense to me and hoping you can help.

If I delete the cubemap and lighting cache you can see the environmental lights in the green cube and plane as you indicate. This is why a light probe is required. It gets rid of the environmental reflection problem.
The only things you should see as reflections in this scene are the walls, the sphere, the cubes, plane, and the environment map as seen through the window.

If I bake the cubemap I do not see the environmental lighting in the green cube, plane or the reflection in the sphere when viewing in Blender Display Render Preview or in a rendered image. Blender produces the desired result.

When we take the scene then go Verge3d Sneak Peak there are no environmental reflections in the green cube or plane…but there are environmental reflections in the sphere….creating a reflection as if I did not have a Reflection Cube.

From this it almost sounds like the reflection of the environment within the sphere is not taking into account the reflection cubemap. It appears to somehow calculate before the reflection cubemap or just ignoring it.

At least that what it seems to me.

From what you are saying…the reflection is calculated before the cubemap and that’s just the way it is…thus all reflections using lightprobe will have the environment map as part of the reflection. Am I understanding that correctly?

After viewing the Global Illumination demo file…the issue is not found. I quickly deleted the faux background and recreated the cubemaps and still, I can’t recreate the issue that I am having in the simple box.

However, there is a noticeable setup difference in the cube maps. See attached image. There are what appears to be Reflection Cube Map Spheres that have the map applied to them. They are not selectable but do show what the map looks like. If I add another reflection cube, it will also generate the sphere. However, a new project will not generate these spheres. Since the problem does not appear in this scene and these spheres do not appear in my test project I am wondering if these spheres are part of the solution. Do you know how these spheres are activated? I would like to try them in my simple cube test and see what happens.

Also in Global Illumination file under Scene Properties, there is a custom property set of oscurart that is not a part of 2.93 shipped addons but was wondering if that was causing the sphere?

ok..its not me…its this site…didnt’ like a 3.3Mb JPG…so here is a small one..fingers crossed.

Yes…thats how it seems the scene avoids these issues. But the perfectly reflective spheres that appear in Blender that are not rendered…have perfect reflection maps.

1. How do I activate, deactivate or manipulate those strange spheres?
2. How are the spheres generated? What setting in blender is causing it?

Thank you