Is it possible to create reflections that only show specific objects on the ground?

[brcontainer]

Godot Version

v4.3.stable.official [77dcf97d8]

Question

I prefer not to use SSR because I only need reflections for the moving characters, while baked reflections will suffice for the rest. Is this approach feasible?

I tried using ReflectionProbe, but I can’t align the reflection with the characters (see image attachment). How can I fix this? (Note that I have already set the cull mask so that only the characters are drawn by the probe).

Would a shader be the only feasible approach for this particular situation?

[Sweatix]

@brcontainer

I prefer not to use SSR because I only need reflections for the moving characters, while baked reflections will suffice for the rest. Is this approach feasible?

There’s a small section on Godot Docs talking about the benefits and drawbacks of SSR. Here it is stated that:

@Godot Docs | Screen-Space Reflections (SSR)

Screen-space reflections can be used at the same time as other reflection sources to benefit from detailed reflections when possible, while having a fallback when screen-space reflections cannot be used (for example, to reflect off-screen objects).

So it should be feasible to mix dynamic and static reflection techniques. However, I’m not too sure on how you would limit SSR to a specific set of objects.

@brcontainer

I tried using ReflectionProbe, but I can’t align the reflection with the characters (see image attachment). How can I fix this?

If I remember correctly, you should just be able to set the probe’s projection mode to Box. This modifies the way the reflection map is captured and applied to fit within the bounding box you’ve configured for the probe.

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What is your problem with SSR? What is the reason that you don’t want to use it? Apart from ray-tracing and path-tracing (which requires specific hardware – I don’t even know if Godot has that), screen-space techniques are your only option for real-time applications; a continuously updated reflection probe is not viable in medium-to-large scale projects.

[brcontainer]

@Sweatix

If I remember correctly, you should just be able to set the probe’s projection mode to Box. This modifies the way the reflection map is captured and applied to fit within the bounding box you’ve configured for the probe.

Thanks for commenting.

Box mode does not solve this:

Yes, my motivation is to use it on some more limited hardware and I will use it in specific places, small scenes. Thanks.

[Sweatix]

@brcontainer

Yes, my motivation is to use it on some more limited hardware […]

Does this imply that SSR is not viable for your target platform? You still haven’t answered my question regarding your problem with SSR.

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I’m willing to discuss your problem and come up with a solution. I do, however, expect a certain level of attention from you in return. Loose replies do not cut it.