Blender folks: I have a 180° frame from YouTube that I want to stretch inside a half-sphere to make it 180° immersive. The image is rectangular, so I'm struggling with the UV map since unwrapping a sphere cuts the corners off, and scaling it up loses the spherical effect. How would you reconcile that?
@christianselig I'm sure there's a way to do it in Blender with Texture Coordinates in the shader graph or something, but I can’t figure it out. The cheater's solution, which I assume doesn't work for you(?), is to just double the width of the image horizontally. Basically un-crop it 200% in width like this.
@christianselig Okay, I figured it out. Don't unwrap the sphere's uv's just use them as-is. in the UV Editor scale them in X to -2 (since you want the texture on the inside). That'll get you a sphere with 2 copies of the image, split down the middle…
@dan Ah that's awesome, I ended up basically doing this, but splitting the sphere in half so only half the UV map is present, then scaling it horizontally by two so it covers the whole map fully
@christianselig Oh, nice. Yeah, that's the same thing, you just don't have all those extra UVs hanging off the sides to deal with. I really expected there to be some way to specify a partial equirectangular image in the shader graph, but apparently it's just good old UVs for this.
@caseyliss That was actually super interesting and applicable. I admittedly wish there was a "noob" section covering how the heck to create such a complex UV map in Blender though
@evankstone@caseyliss Yeah there’s a bunch of tutorials out there thankfully. Oddly not a ton on editing UV mappings of default shapes though like this
@christianselig Unlit Surface/Material just don't react to the lights in the environment, so it will show whatever color it is. It's useful for more accurate video playback in most cases.
@khaost Sorry, I meant that does look like it's reacting to the lights since it's all washed out (see source image giraffe) compared to using an UnlitMaterial without a shader
@schwa@khaost The user can't actually interact with the water so I'm not too worried about actually accurate fluid dynamics (in fact nothing can interact with the water). It's more of an ambient environment to watch videos in goal, sorta like how Mount Hope has the lake with little pulses
@schwa@christianselig There are a few examples on YouTube for doing this in Unity, you can mostly mirror the shader graph setup to get something similar
@schwa This is probably a me issue, but I went to open it today to check something and poking around inside I don't see the USDA file inside the RealityComposePro package, how do I get to the yummy bits
@christianselig my blender skills range from “bad” to “real bad”, but I would try to move the four corners with the “magnetize” option on where it can drag nearby points along an “influence-curve”.
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