Openai/696480e2-8c90-8013-9d6f-6ccbd15d2db6
This conversation was exported from ChatGPT[1]
gpt-5-2 edit
User: myabe my issue has to do with the blocks i used that it reflects off? edit
myabe my issue has to do with the blocks i used that it reflects off?
Assistant: Yeah — that’s actually very likely the issue 👍 edit
Yeah — that’s actually very likely the issue 👍 Reflection problems almost always come from the blocks themselves, not the projectile or logic you’re testing.
Here are the most common ways blocks cause reflection bugs, so you can check which one matches what you’re seeing:
If your reflect math uses the surface normal: edit
- Blocky / axis-aligned parts can give perfect 90° normals
- Edges and corners can return unexpected normals
- Some engines return (0,0,0) briefly on edge hits
🔎 Symptom:
- Projectile reflects at weird angles
- Sometimes reflects straight back or sideways
Fix ideas
- Clamp or snap normals to axis directions
- Ignore collisions where normal magnitude ≈ 0
- Add a small bias away from the surface before reflecting
If the projectile: edit
- Hits two faces at once
- Or reflects and immediately re-collides
🔎 Symptom:
- Infinite bouncing
- Projectile sticks to the wall
- Direction flips repeatedly
Fix ideas
- Cooldown between reflections (even 1–2 frames)
- Move projectile slightly along reflected direction after impact
- Disable collision for a split second after reflect
In Roblox especially: edit
- Union / Mesh / Scaled parts may have collision that doesn’t match visuals
- Some parts are still treated as axis-aligned boxes
🔎 Symptom:
- Reflects before touching
- Reflects off “air”
- Wrong angles on slanted-looking blocks
Fix ideas
- Enable CollisionFidelity = PreciseConvexDecomposition
- Test with simple Parts first
- Avoid scaled parts for reflection tests
If reflection is based on velocity directly: edit
- High speeds exaggerate errors
- Floating-point drift builds up
🔎 Symptom:
- Reflections get worse over time
- Angle slowly “decays”
Fix ideas
- Normalize direction before reflect
- Reapply speed after reflection
If the block has logic like: edit
- Touch events
- Damage triggers
- Force application
🔎 Symptom:
- Reflection logic fires twice
- Direction changes inconsistently
Fix ideas
- Centralize reflect logic in ONE place
- Ensure only projectile handles reflection
Try this: edit
- Replace all reflective blocks with plain default Parts
- Axis-aligned, no scaling
- Test reflection
If it suddenly works → 100% the blocks were the issue
If you want, tell me:
- Roblox or another engine?
- Are these Parts, MeshParts, or Unions?
- Raycast-based reflection or Touch events?
I can pinpoint it fast once I know that.
User: oops, my problem is my light wont render in blender edit
oops, my problem is my light wont render in blender
Assistant: Ahhh got it 😄 — Blender moment. edit
Ahhh got it 😄 — Blender moment. No worries, this is a very common issue. Let’s narrow it down cleanly.
Here’s a quick checklist, top to bottom, that fixes ~90% of “light won’t render” problems in Blender:
Lights do not show in Solid view. edit
- Press Z → Rendered
- Or click the rightmost sphere icon (viewport shading)
🔎 If the light suddenly appears → that was it.
Lights behave differently depending on engine. edit
Check top-right:
- Eevee → real-time, faster
- Cycles → path-traced, physically accurate
⚠️ If you’re in Workbench, lights won’t render at all.
➡️ Switch to Eevee or Cycles
Lights can be disabled without you noticing. edit
Select the light → Outliner:
- 👁️ (viewport) must be ON
- 🎥 (camera icon) must be ON
If the camera icon is off → it won’t render.
Default strength is often invisible in real scenes. edit
Try this:
- Point / Spot light → Strength: 1000–5000 W
- Area light → 100–1000 W
- Sun light → Strength: 1–5
Also check:
- Light radius / size not massive
- Light is close enough to the object
Your World might be too bright. edit
Go to:
- World Properties
- Lower Strength to 0–0.2
If the scene suddenly looks right → your world light was drowning it out.
If faces are inverted, they won’t light properly. edit
- Select object
- Edit Mode → A
- Shift + N (Recalculate Normals)
Enable:
- Overlay → Face Orientation
- Blue = correct, Red = flipped
Check the material: edit
- Not using Emission only
- Roughness not 1.0
- Color not pure black
Quick test:
- Assign Principled BSDF
- Base Color: gray
- Roughness: 0.5
If using Eevee: edit
- Enable Lights in viewport shading dropdown
- Enable Shadows in Render Properties
- Increase Shadow Cube Size (1024+)
If using Cycles: edit
- Increase Light Bounces
- Check Clamp Indirect Light isn’t too low
- Try switching Device: GPU / CPU to test
Do this and tell me what happens: edit
- New file
- Add Cube
- Add Point Light
- Set Strength → 2000
- Switch to Rendered View
- Eevee or Cycles
If that works → your original scene has a setting conflict, not a Blender bug.
- Eevee or Cycles? edit
- What type of light?
- Blender version?
- Does it show in viewport but not final render (F12)?
I’ll zero in on it immediately.
User: this is what it looks like edit
this is what it looks like
Assistant: Perfect — the screenshot helps a LOT. edit
Perfect — the screenshot helps a LOT. I can actually see the problem now, and it’s a classic Blender gotcha.
You are currently in Solid View, not Rendered View — and Solid View is set to ignore scene lights. edit
That’s why your Spot light exists, but it looks like it does nothing.
### edit
- Press Z
- Choose Rendered
OR click the rightmost sphere icon in the top-right of the viewport.
Your light will immediately appear.
If you want to stay in Solid View: edit
- Click the Solid View sphere
- Open the small dropdown next to it
- Under Lighting, change: - ❌ Studio - ✅ Scene Lights
- (Optional) Enable Scene World
Now Solid View will respect your Spot light.
Your Spot light scale is insane: edit
Scale:
X: 6
Y: 120
Z: 1
Dimensions:
Y: 249 mLights should NEVER be scaled — it causes weird behavior.
1. Select the Spot light edit
- Press Ctrl + A
- Apply Scale
Then adjust lighting using:
- Power
- Spot Size
- Blend
Not scale.
- Switch to Rendered View edit
- Set Spot light Power to 3000–8000 W
- Make sure it’s pointing at the ground
- World strength ≈ 0.1
You’ll see it immediately.
✔ Your light is fine edit
❌ Viewport mode is hiding it ❌ Light scale is breaking expected behavior
If you want, tell me:
- Eevee or Cycles?
- Is this for a game asset or a render?
I can tune the exact settings for your use case.
User: i know the render view, but remdering it doesnt work. edit
i know the render view, but remdering it doesnt work.
Assistant: Gotcha — thanks for the clarification. edit
Gotcha — thanks for the clarification. Since Rendered View works but the final render (F12) does not, that narrows it down a LOT. Based on your screenshot and Blender 5.0.1, this is almost certainly one of the following render-only exclusions.
I’ll go straight to the most likely causes, in order.
This is very easy to miss. edit
In the Outliner (top right), look at your Spot light: edit
You’ll see icons like:
- 👁️ = viewport
- 🎥 = render
➡️ Make sure the 🎥 camera icon is ON for the Spot light
If the camera icon is off:
- Light shows in viewport
- Does NOT appear in final render
This matches your symptom perfectly.
Workbench ignores lights completely. edit
- Go to Render Properties edit
- Render Engine must be: - ✅ Eevee - or ✅ Cycles
- ❌ NOT Workbench
Even if viewport is correct, F12 uses the render engine.
If you’re using View Layers: edit
- Top right → ViewLayer
- Make sure the light is in the active collection
- Make sure that collection is enabled for rendering
Collections also have a 🎥 icon.
Your light has non-uniform scale, and Blender warns about it: edit
This can break spotlights in renders.
1. Select the Spot light edit
- Press Ctrl + A
- Apply Scale
Then:
- Increase Power (try 5000–10000 W)
- Adjust Spot Size, NOT scale
Do this in your SAME FILE: edit
- Shift + A → Light → Point Light
- Set Power = 5000
- Place it above the cubes
- Press F12
- ✅ If the new light renders → your Spot light settings are broken edit
- ❌ If it doesn’t → render engine / collection / camera issue
Check these only if above fails: edit
- World Strength > 1.0 can flatten lighting edit
- Set World Strength to 0.1
- Press Numpad 0 edit
- Make sure camera actually points at the lighted surface
- Disable Compositing edit
- Render again
If it still doesn’t work, show me one of these: edit
- Render Properties panel
- Outliner (with camera icons visible)
- The F12 render result
We’re past guessing now — this is a toggle or scale issue, not a Blender bug.
User: the outliner is fine, the scale is 1,1,1 and i'll test the light thing now edit
the outliner is fine, the scale is 1,1,1 and i'll test the light thing now
Assistant: Perfect — that rules out the two biggest traps 👍 edit
Perfect — that rules out the two biggest traps 👍 If outliner is fine and scale is applied (1,1,1), then this comes down to a render-engine or light-type specific setting. Let’s lock it down cleanly.
I’ll give you a short, deterministic test so we know exactly where it’s breaking.
Go to Render Properties and do this exactly: edit
- Render Engine → Eevee edit
- Disable Use Compositor
- World Strength → 0.0
- Add Point Light - Power: 5000
- Press F12
👉 If this works → Eevee is fine
- Switch Render Engine → Cycles edit
- Device: CPU (for test)
- Light Bounces: - Total: 4
- Same Point Light
- Press F12
👉 If Cycles works but Eevee doesn’t → Eevee setting issue
Check these Eevee-only switches (very common): edit
- ✅ Lights edit
- ✅ Shadows
- ❌ Disable Soft Shadows (just for test)
- Increase Shadow Cube Size → 1024
Also:
- Viewport Shading dropdown → Enable Lights
Then it is NOT the light — it’s visibility. edit
Select one cube → Object Properties: edit
- Visibility → Ray Visibility - ✅ Camera - ✅ Diffuse - ✅ Glossy
If Camera is unchecked, the object renders black/unlit.
If you used Geometry Nodes or modifiers earlier: edit
- Disable Modifiers in Render
- Apply modifiers temporarily
- Re-render
Lights can appear in viewport but not affect GN geometry in render.
If you just want to confirm it’s a settings corruption: edit
- File → Append
- Append Object → Cube into a new file
- Add Point Light
- Render
If that works → your original scene has a bad render flag (rare but real)
Reply with just ONE of these and I’ll finish it: edit
- “Eevee fails, Cycles works”
- “Both fail”
- “Point light works, Spot doesn’t”
At this point we’re 1 toggle away from the fix.
User: the new light didnt render edit
the new light didnt render
Assistant: Alright — this is actually very telling. edit
Alright — this is actually very telling. If a brand-new Point Light also doesn’t render, then this is not a light problem at all.
At this point, there are only a few things left that can cause all lights to fail in F12*. We’ll knock them out one by one, fast.
### edit
Even if viewport looks fine, F12 uses the render engine, not viewport.
👉 Go to Render Properties (camera icon) What does it say exactly?
It MUST be:
- ✅ Eevee
- or ✅ Cycles
If it says:
- ❌ Workbench → lights will NEVER render
👉 Change it → press F12 again
Check this carefully: edit
Top right → ViewLayer Properties
- Make sure Use Light is ✅ ON
- Make sure Holdout is ❌ OFF
- No overrides enabled
If Use Light is disabled:
- All lights are ignored
- Objects render flat / dark
This one causes exactly what you’re seeing.
Still in ViewLayer Properties: edit
- Look for Material Override
- If ANY material is set there → remove it
Overrides can ignore lighting entirely.
This one is sneaky but real. edit
Go to Render Properties → Color Management
- View Transform: Filmic
- Exposure: 0
- Gamma: 1
If Exposure is like -10:
- Everything renders black
- Lights “don’t work”
Press Numpad 0 edit
Then check Camera Properties:
- Clip Start: 0.1
- Clip End: 1000
If your scene is ~250m long (your screenshot shows that):
- Clip End too low = nothing lit / visible
This is guaranteed to isolate it. edit
- File → New
- Choose General
- Do NOTHING
- Press F12
- You see a cube edit
- You see lighting
- You see shadows
👉 If this works: Your original file has a View Layer / Render setting override
👉 If this does NOT work: Your Blender install is broken (rare, but possible)
If I had to bet: edit
- Render Engine = Workbench
- View Layer → Use Light is off
Those two explain everything you’ve described.
When you press F12, what does the render look like? edit
- Completely black?
- Flat gray?
- Visible geometry but no shading?
That answer pins it down instantly.
User: explian the soluion steps SPECIFICALLU edit
explian the soluion steps SPECIFICALLU
Assistant: Got it — I’ll explain that exact solution slowly, explicitly, and click-by-click, with no assumptions. edit
Got it — I’ll explain that exact solution slowly, explicitly, and click-by-click, with no assumptions.
We are ONLY fixing View Layer → Use Light.
If Use Light is OFF, Blender ignores every light in the scene during F12 renders, even brand-new ones. edit
Viewport can still look “okay”, which is why this is confusing.
### edit
- Look at the right-hand Properties panel
- Find the icons running vertically
- Click the icon that looks like two stacked photos - This is View Layer Properties
⚠️ Do NOT click Render Properties (camera icon) ⚠️ Do NOT click Object or World
1. Inside View Layer Properties, scroll down if needed edit
- Find a section labeled “Light”
You will see:
- Use Light ☐ (checkbox)
- Holdout ☐ (checkbox)
- ✅ CHECK → Use Light edit
- ❌ UNCHECK → Holdout
This is the critical fix.
Still in View Layer Properties: edit
- Look for Material Override
- If there is ANY material listed there: - Click the X to clear it
Overrides can force flat / unlit renders.
1. Press F12 edit
- Your lights should now appear immediately
- Light affects objects edit
- Shadows appear
- New lights work instantly
- Spot / Point / Sun lights all render
- New lights don’t render edit
- Old lights don’t render
- Geometry visible but flat
- Changing light power does nothing
This setting is usually disabled by: edit
- View Layer duplication
- Importing scenes
- Geometry Nodes setups
- Template files
- Certain addons
Blender does not warn you when it’s off.
After you do this, tell me yes or no: edit
If not, we move to the next single toggle — but this one matches your symptoms exactly.
User: what's occlusion distance edit
what's occlusion distance
Assistant: Occlusion Distance is a light cutoff range — it tells Blender how far a light is allowed to affect objects. edit
Occlusion Distance is a light cutoff range — it tells Blender how far a light is allowed to affect objects.
If an object is farther than this distance, the light does nothing to it, even if the light is strong.
Think of it like this: edit
So if:
- Your light is 50 m away
- Occlusion Distance = 10 m ➡️ No lighting appears at all
This makes it look like lights are broken, when they’re actually just limited.
- Eevee only (Cycles ignores it) edit
- Applies to Point, Spot, and Area lights
- Often defaults to 0 (disabled) — but if it’s been set accidentally, it can break lighting
1. Select the light edit
- Go to Light Properties (💡 icon)
- Scroll down to Eevee
- Find Occlusion Distance
You’ll see:
- 0.00 m → disabled (good for testing)
- Any positive number → cutoff range
For testing: edit
- Set Occlusion Distance = 0
For real scenes:
- Small room: 10–30 m
- Large scene: 100–500 m
| | | edit
| --- | --- | | | | | | | | | |
If: edit
- New lights don’t render
- Scale is correct
- View Layer is correct
- Engine is Eevee
Then Occlusion Distance ≠ 0 is one of the last remaining causes.
1. Select your Point Light edit
- Set Occlusion Distance = 0
- Press F12
If the light suddenly works — that was the issue.
If it still doesn’t, the next thing to check is camera clipping or material overrides, and we can do that step-by-step too.
User: OH its at 10 rn edit
OH its at 10 rn
Assistant: Yep — that’s it. edit
Yep — that’s it. That’s the whole problem. ✅ Your lights were being hard-cut off at 10 meters, so anything farther away got zero lighting, which makes it look like lights “don’t render”.
1. Select the light edit
- Go to Light Properties (💡 icon)
- Scroll to Eevee
- Find Occlusion Distance
- Change: - 10 m →
0 m
0 = disabled (infinite range)
- Press F12
Your light will render immediately.
- Your scene is huge (hundreds of meters — I saw ~249 m in your screenshot) edit
- Eevee lights stop affecting anything past Occlusion Distance
- Strength doesn’t matter once you’re outside that range
So even a 50000 W light does nothing past 10 m.
For large scenes: edit
- 0 m → safest
- or 200–500 m if you want performance savings
For small rooms:
- 10–30 m is fine
Add a new Point Light → it will inherit 0 m by default now edit
Render → it works
Nice catch noticing that value — that one trips up even experienced Blender users. If you want, I can help you tune Eevee lighting for large-scale scenes so you don’t hit this again.
User: aaaaaaaaaaaaaand its still broken edit
aaaaaaaaaaaaaand its still broken
Assistant: Alright — deep breath 😄 edit
Alright — deep breath 😄 Since Occlusion Distance wasn’t the final fix, we are now in “only 3 things left in Blender can cause this” territory. I’ll walk you through them one at a time, very specifically, and we will stop as soon as one works.
No guessing. No jumping.
🔴 STEP 1 — CONFIRM THE RENDER ENGINE (EXACTLY) edit
This sounds obvious, but it must be verified right now.
- On the right Properties panel
- Click the camera icon (Render Properties)
- At the very top, find Render Engine
👉 It MUST say Eevee or Cycles
- ❌ If it says Workbench - Change it to Eevee - Press F12 - STOP HERE
Tell me if that fixes it.
🔴 STEP 2 — CAMERA CLIPPING (THIS MATCHES YOUR SCENE SCALE) edit
Your scene is HUNDREDS of meters wide. If the camera clip end is too small, lighting appears broken.
Do this EXACTLY: edit
- Press Numpad 0 (go into camera view)
- Select the Camera
- Click Camera Properties (📷 icon)
- Find Clipping
- Set: - Clip Start → 0.1 m - Clip End → 1000 m
- Press F12
👉 If lighting suddenly works: this was it.
🔴 STEP 3 — MATERIAL IS IGNORING LIGHT edit
This one causes “lights don’t work” even when everything else is correct.
Test with a guaranteed-good material: edit
- Select ONE cube
- Go to Material Properties
- Click New
- Make sure it is Principled BSDF
- Set: - Base Color → mid gray - Roughness → 0.5 - Emission → BLACK
- Press F12
👉 If that cube lights correctly, your old material was the issue.
🔴 STEP 4 — VIEW LAYER LIGHT OVERRIDE (FINAL KILL SWITCH) edit
You already checked this once, but we will hard-reset it.
- Click View Layer Properties (two stacked images icon)
- Under Light - ✅ Use Light - ❌ Holdout
- Under Overrides - Material Override = EMPTY
Press F12.
🔥 ABSOLUTE FINAL TEST (NO ESCAPE) edit
If it STILL fails, do this exactly:
- File → New → General
- Do NOT touch anything
- Press F12
Expected result: edit
A cube, lit, with shading.
- ✅ If this works → your original file has a corrupted render setting
- ❌ If this does NOT work → Blender install/config is broken
There is no other possibility at that point.
📌 I need ONE answer from you edit
Reply with only one of these:
- “New file renders fine”
- “New file is also broken”
That single sentence tells me exactly what to do next.
References edit
- ↑ "Block Reflection Issues". ChatGPT. Retrieved 2026-01-13.