[Tutorial] IES Light on Unity

Without IES Light

IES Light on Unity

Back then, I thought IES light was useless, but when I’m making an interior scene for my Animation I notice a weirdness on ceiling lights. It was circle!!! There’s no circle shaped ceiling lights (except lightbulb)!

You’ll gonna need

• IESviewer 2.9
• Prtscr (Optional, if you don’t want to use MSPaint)
• And IES / LDT light of course!

And this is how

1. 
2. Go to IES Viewer and right click on your IES or LDR light and then click Render, or simply just press CTRL+R. Sometimes, the Render window just wont show, just delete .ini file and reopen IESViewer.
3. 
4. Adjust brightness, Zoom, and Distance until you pleased with the result then press Prt Scn / Print Screen on your keyboard. If you don’t have PrtScr, then you’ll need to open MSPaint (Press Winkey + R and type MSPaint). If you have PrtScr, hold CTRL and left click the render window and it’ll automatically crop it.
5. 
6. Paste (CTRL+V) on MSPaint and then crop the pasted clipboard like this. Save it as JPG or PNG.
7. This is my IES Light
8. Now go to Unity and import your IES light. Set texture type as Cookie, Light type as Point, Mapping : Mirrored Ball, Glossy Reflection, Fixup Edge Seams, Alpha from Grayscale (IMPORTANT!), and filter mode to Trilinear.
9. Go to Game Object > Light > Point Light, and assign your IES file to Cookie texture.
10. 
11. Now look! IES Light on Unity! Although it’s not important, but it’ll make scene looks more realistic than a nonsense circle light.