automated snapshot

main.go

@@ -62,7 +62,8 @@ func main() {
 
 	imageLayer := NewImageLayer("/home/d/Dropbox/photos/Events/2025/Aurora/Photo Nov 11 2025, 9 52 03 PM.jpg")
 
-	sketch.AddColorLayer("background-black", rl.Black)
+	//sketch.AddColorLayer("background-black", rl.Black)
+	sketch.AddColorLayer("background-magenta", rl.Magenta)
 	sketch.AddLayer("field", &FieldLayer{field: field, dirty: true})
 	contourLayer := NewContourLayer(&sketch, rng, field)
 	sketch.AddLayer("contours", contourLayer)

sketch.go

@@ -101,13 +101,11 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
 			layer.Draw(ctx)
 			rl.PopMatrix()
 			rl.EndTextureMode()
-			//rl.GenTextureMipmaps(&instance.texture.Texture)
 		}
 	}
 
 	// composite all layers to screen
 
-	outputRect := s.calcOutputRectKeepingAspectRatio(ctx)
 
 	// copy from full texture for compositing, with vertical flipping
 	src := rl.Rectangle {
@@ -124,7 +122,7 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
 	viewport := s.CalcViewport(ctx)
 
 	rl.BeginTextureMode(s.composite)
-	rl.ClearBackground(rl.Black)
+	//rl.ClearBackground(rl.Black)
 	for _, instance := range s.layerToolsOrdered {
 		config := instance.config
 		if config.visible {
@@ -146,6 +144,7 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
 	}
 	rl.EndTextureMode()
 
+	outputRect := s.calcOutputRectKeepingAspectRatio(ctx)
 	rl.DrawTexturePro(s.composite.Texture, viewport, outputRect, rl.Vector2{}, 0, rl.White)
 
 	outlineRect := outputRect.ToInt32()