How to make this light reflection? (see image)

Hi all,

Do we think its possible to get Enscape to simulate the reflected light, as per the image below?

Its an Atrium surrounded by offices, there are large windows up both sides - the sun comes over, light hits the windows and is reflected down into the Atrium casting these lovely washes of light on the dark walls and stone floor.

I’ve modelled up the Atrium and windows pretty accurately, I’ve geolocated the model so the sun is more or less at the correct angle for the time of day, I’ve got all the raytracing options on etc - I’ve been playing around with various glass materials for the windows but nothing seems to replicate this.

Is it even possible? Anyone got any clever thoughts?

No one got any thoughts? Ah well.

I think it’s probably an effect called “refraction” or " translucency ". Perhaps the most convenient is to use an image / texture / on the plane of the glass with additional transparency percentage adjustment. In ENSCAPE there is a type of material - as transparency / foliage / / But you need to play with the settings on it .

Looks like there are irregularities in the glass, probably from the toughening process causing inconsistent light to get through.

You could try a striped texture on the glass with a transparency to see if it’ll block enough of the escape light to simulate the effect.

@ART_ZAM & @Paul_Russam Thanks for the thoughts both. Yes, I’ve tried both of those ideas but no joy. Just been playing around with a variety of textures set as a transmittance value on the glass and it doesn’t generate the effect of any specific light pattern reflected light on other surfaces. Also can’t get any effects using mirrors and perlin noise map etc, I’ve tried varying lights, light strengths, distances from the material etc.

Certainly colour is bounced around, but actual light elements don’t appear to be, so unless I’m missing something I’m going to have to assume its not achievable.

Sounds like you’re describing caustic reflections, which Enscape doesn’t support afaik.

Caustics! That’s the word. Been bugging me throughout this process that I wasn’t sure what the effect was called.

You’re right, its caustics. Enscape can do them in a body of water but otherwise not it appears.

They are fake ones on water - not related to the surface I don’t think.

If you have the hardware, the new RTX ray traced sun lights features can be used to create a lensing effect which I think what is being cast for some of these light patches - as glass materials can now cast shadows based upon their thickness(?)

I made some cylindrical lenses over my window opens to create this effect. If you used some more irregular geometry and played with shadow sharpness I bet you could get something along the lines

If you have the experimental features on you could even “project” some patterns into places where you want them.

let us know how you get on!