diff --git a/README.md b/README.md
index 5f9858f..4cdff53 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,10 @@
 
 *img2irc* is a premiere command-line utility which converts images to irc/ansi art, with a lot of post-processing filters
 
-`$ img2irc https://i.imgur.com/qP1uBCK.png --render ansi --blocks --width 122 --contrast 20 --scale 1:1.05`
+`$ img2irc https://i.imgur.com/qP1uBCK.png`
 
 >  
->![img2irc block example](https://i.imgur.com/OhOPmBQ.png)
+>![img2irc block example](https://i.imgur.com/ew513lc.png)
 >   
 
 # how to install
@@ -49,9 +49,9 @@
 
 ### colours rendering modes
 
-| option                                 | description                                                   | 
-|----------------------------------------|---------------------------------------------------------------|
-| --render                               | colour rendering mode (default: `irc`)                        |
+| option                                 | description                 | default          | 
+|----------------------------------------|-----------------------------|------------------|
+| --render                               | colour rendering mode       | `ansi`           |
 
 `irc` mode has 99 colours, (6.62-bit)
 
@@ -59,12 +59,12 @@
 
 `ansi24` has 16777216 colours (24-bit)
 
-### pixel rendering modes (select one)
+### pixel rendering modes
 
-| option        | description                   |
-|---------------|-------------------------------|
-| `--braille`   | use braille pixels            |
-| `--blocks[=types]` | use block pixels of the provided types. defaults to `full,half,quarter,eighth,triangle,corner,geometric,box,legacy` |
+| option        | description                   | default      |
+|---------------|-------------------------------|--------------|
+| `--braille`   | use braille pixels            | `false`      |
+| `--blocks[=types]` | use block pixels of the provided types  | `full,half,quarter,eighth,triangle,corner,geometric,box,legacy` |
 
 #### braille mode
 
diff --git a/src/args.rs b/src/args.rs
index 38ce188..7583255 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -77,7 +77,7 @@ pub struct Args {
     pub flipv: bool,
 
     /// colour mode to use
-    #[arg(long, value_enum, default_value_t = Render::Irc)]
+    #[arg(long, value_enum, default_value_t = Render::Ansi)]
     pub render: Render,
 
     /// use braille pixels
@@ -85,7 +85,6 @@ pub struct Args {
         long,
         default_value_t = false,
         conflicts_with = "block",
-        required_unless_present = "blocks"
     )]
     pub braille: bool,
  
@@ -95,7 +94,7 @@ pub struct Args {
         value_enum,
         value_delimiter = ',',
         num_args = 0..,
-        default_missing_values = &[
+        default_values = &[
             "full",
             "half",
             "quarter",
@@ -107,7 +106,6 @@ pub struct Args {
             "legacy",
         ],
         conflicts_with = "braille",
-        required_unless_present = "braille"
     )]
     pub blocks: Vec<BlockKind>,